for sunday's presidential elections. 50,000 police and seven thousand soldiers are being deployed to protect voters. it follows the killing of a police officer in central paris on thursday night. the president of afghanistan has declared sunday as a day a mourning —— the president of afghanistan has declared sunday as a day of mourning for the victims of the taliban attack on a military base close to the northern city of mazar—e—sharif. dozens of soldiers were killed when the militants fired on them in a canteen and as they left a mosque. emergency teams have been despatched to contain an oil spill on one of the canary islands after a ferry crashed into a pier and damaged underwaterfuel pipes. a 3km—long slick is threatening the coast around las palmas, on gran canaria, and telde, further to the south. 140 passengers and crew were on board at the time. those are the latest headlines. we'll have a full bulletin at the top of the hour but now on bbc news, it's time to click. this week: how to stare

at your phone and change the world. strawberries in a massive box. and — fancy working in an enormous train station? i don't know if you have noticed, but there seems to have been a lot of election talk of late. this week, click is taking a trip to paris, where this weekend, the french take to the polls in the first round of their presidential election. and curiously, from a technology point of view, the way we vote seems, if anything, to be going backwards. in the last election, france did allow online voting for those living overseas.

but not this time. for both the presidential elections and the legislative elections injune, it is back to pen and paper. and that is due to the fear of cyber attacks, which the french national cyber security agency says are an extremely high risk. queues of people, paper voting — surely there has to be a better way. well, we asked bbc newsbeat‘s political editor jonathan blake to have a look. ancient institutions and modern technology — the two do not always go together. as elections are held worldwide throughout 2017, that could radically reshape the political landscape, most people will cast their vote in the same way it has been done for decades — using a pencil and paper to put a cross in a box. in the uk, election turnout has fallen steadily. those campaigning for online voting say the system is stuck in the past and it is time to

digitise our democracy. it would make politicians pay attention more to the groups that would be enfranchised by this method of voting. so those groups would be young people, because they are the ones who engage most online, and groups like people with disabilities, or with vision impairments, of whom there are 2 million in this country, voters abroad, and the armed forces. if they have this accessibility to voting, politicians will have to listen to them. 0ne company is working on a way to make voting more convenient and, they say, more secure, with an app that lets you register and vote by selfie. it uses facial biometrics, and combines that with some sort of government document, whether it is a passport or driver's licence, to create a digital identity, which the voter is in control of. so this is a demonstration version of the app which smartmatic have made. we will start by registering, first of all. it is asking me to take a selfie.

the next stage is to add photo id. we will go with driver's licence, because i have that handy. once the idea is matched to your face, the app confirms you are registered to vote. and we are voting for rushfield borough council, which is not a real place. it is asking me to take a photo, so i hold up a camera and the phone will take a selfie automatically. so here there is a list of candidates, the same as you would see on the ballot paper. i don't need to tell you who i'm voting for, so i won't. i will pick one at random. and that's it. it says you have cast your vote successfully, and it has given me a unique receipt number, which i can either copy or send to myself by e—mail. you are asking people to take a photo of their face, capture an image of the photo identification. how secure is that information, where does it go? the digital identity you create is unique to you, and it stays on your device, on your personal mobile phone or tablet, whatever you use to take it.

it doesn't get stored anywhere. you are in control of it at all times, and you are in control of what pieces of information you use to create that idea, and who you share it with. when it comes to security, we apply non—standard, additional layers of security, in terms of really strongly encrypting the vote on your device, to add that additional layer of protection. but concerns about cyber security mean countries once embracing the use of technology in democracy are having second thoughts. in the netherlands, where the voting system has been computerised since 2008, this year, they are counting votes by hand. but the country that has earned a reputation as the electronic voting capital of the world is sticking to its guns. estonia is almost sensitive about its digital identity. —— estonia is almost obsessive about its digital identity.

here in estonia, everyone from the age of 15 carries a government—issued photo id card. using this, and accompanying pin numbers, you can access your bank, phone company, energy firm, and a lot of official information. you can see this man's name, address, date of birth, where he went to school, health records, everything down to what car he drives. in estonia, voting isjust another thing you can do online. download software, use your id card and pin to make a selection, and vote from the comfort of your home, or wherever is convenient. around one in three votes is now cast online, but officials admit it has not boosted turnout. the internet voter is a transformed paper voter. having a novelty, a convenient method of voting, is not enough to bring people from the no—voting zone back to voting, or to voting. because you need other incentives.

you need policy, you need a reason to vote. i think it is interesting, but it needs proper security, and right now, the measures are not good enough, in my opinion. using the smart id we have, it is easy, and quick access to everywhere. i have used it, and i think it is very useful. and it is very convenient, so i don't have to go somewhere to queue. other countries seem reluctant to follow estonia's lead. the british minister responsible for elections told me the government is looking only at taking very small steps. they have identification cards, and they keep the systems. —— the amount of information they keep on the citizens is very different to what we have in the uk. it is a very different space to what we have in the uk, where they don't have a privacy agenda, about protecting individual citizens' rights, and protecting their own data. people are happy to do their banking online, shopping online. why not use technology to enable people to vote more easily? going forwards, we have

got to make sure that, while we embrace technology and we embrace things like online registration, online voting is a situation where, if we believe the current paper—and—pen method is the best way forward, then actually, it means that each individual‘s vote is counted equally. 0ne voter, one vote. as technology advances, calls to digitise democracy will continue, but so will concerns about cyber security, so the pencil and paper may well always have its place. that was jonathan blake, and while technology may not be applied to voting at these french elections, it has certainly been causing a stir in other ways. keen to draw attention to his campaign, far—left candidate jean—luc melenchon took to the stage this week, addressing a crowd of 6,000 at a rally in dijon, but at the same time, appeared at six other rallies across the world. they call it a hologram. we call it smoke and mirrors. it is not the first time politicians have used this tech to further their agenda.

india's pm, narendra modi, used it during his campaign, and the turkish president, recep tayyip erdogan, used his avatar to appear at a meeting he couldn't make in person. 0ur political journalist saw melenchon‘s first meeting. it was a particular meeting in france. he was in lyon, with marine le pen, and there was at the same time a big meeting with emmanuel macron, in lyon, as well. so he knew that he was not the top politician, so it was a matter for him to be... to stand out. yes. now, we have seen the pepper's ghost illusion before on click, even it allowed me to get down with psy in korea.

but its use by melenchon allowed him to address six venues simultaneously. a custom rig of 17 lights was created. the trick was to arrange the film lighting, which is pretty much identical to this, on a truss, a picture frame truss, very similar, and angling and lighting the stages, all around the destinations you are broadcasting to. a camera in front of the stage filmed the wide shot, and the signal was broadcast over satellite to five french cities, and reunion island, off the coast of madagascar. do you feel that this is the way that elections will be fought in the future — with holograms and technology and showmanship?

no, i don't think so. i think it is really a coup for melenchon. many media were already there to see and to speak about it. i don't think that it is the way of making politics, for the future days. but will this tech really help connect voters to politicians, or is this transparent projection just a gimmicky barrier, that gets in the way? egalite, oui! welcome one and all to the church of facebook. this is f8, the company's development conference, which this year is being held in sanjose. i am here to find out what mark zuckerberg thinks we will want in the years and decades to come. i will start with the stuff that is happening right away.

facebook, you will no doubt have noticed, is locked in a battle over augmented reality tools like this. you can have a second coffee mug, so it looks like you are not having breakfast alone. facebook also launched spaces, a place to interact with avatars of your friends in virtual reality, when you can't hook up in real life. the company is also releasing these curious little cameras for capturing real—life scenes in full, high—quality 360. the innovation here is the ability for the camera to record footage which has depth. it allows what is known as six degrees of freedom. i can lean in and peer around, even though the camera which took the footage i am seeing hasn't actually moved anywhere. in the past, you were frozen in the middle of a world, as if you were seeing a painting on the ceiling. we wanted you to actually be able to lean in, and actually see the depth.

and here is a neat little trick. the depth perception also means you can add a kind of green—screen effect, without needing a green screen. once you have that information, it is really built on the fact that you have captured the depth. you not only know the colour of that flower, you know how far it is away, and you know how far the ground behind it is away. and you can just subtract the ground away and replace it with grass, instead of rocks or bark. f8 is also about thinking what may be coming much further down the line. this little helicopter is another one of facebook‘s attempts to bring connectivity to difficult—to—reach places. it is tethered to the ground, but once in the air, it can beam internet to an area below, perfect for helping people in disaster zones. they have made it in conjunction with a san francisco—based start—up. the idea is to basically build instant infrastructure. so it is an aircraft on a tether, where fibre and power run up essentially the longest extension cord you have ever seen. so, in an earthquake or a hurricane, you can set up in the sky

and instantly provide internet to all the people who need relief, and can't be reached because of disaster. and then, just when we thought the new ideas were over, things got weird. what if you could type directly from your brain? even something as simple as a yes/no brain click would fundamentally change our capability. it is many years off. they may never be able to do it. but this is the plan. hardware and software that would allow you to post to facebook without moving a muscle. so that's it for another year. and as they pack up, we are all left pondering the question — do i really want to plug facebook into my brain? now, back to paris. and how would you feel about renting your car to a complete stranger? well, believe it or not, here,

there is an app that lets you do just that. drivy has been operating for six years. over 40,000 car owners have chosen to list their cars on the platform, mainly in france, germany, and spain, racking up one—and—a—half million days of rentals. the app gives me a list of vehicles available in the designated area on my chosen date. and then i can swipe through pictures and details of each car. yeah, it's basically airbnb, but for your car. kind of carbnb, i suppose. right, first impressions of the drivy office, it's maximum start—up. table tennis, check. sweetshop, check. writing on the windows, check. but how has this company persuaded thousands of people to learn their cars to others? i don't know whether it is because i'm british,

but i think it's a crazy idea to randomly hire my car out to other people. do you not think that no one will partake of this, because of the risk of damage and having your car stolen? we definitely knew from the start that it would sound like a crazy idea to lend your car, to most people. the question was, would some people agree it was a good idea, and efficient, and how do i protect these people who are willing to try, rather than convince the majority. do you think there is a reason why sharing services do very well here? yeah, i think that france is special, because it has the right mix of being, like, still a rich country, where the law is rarely enforced, where business is going well, with still a mediterranean culture. so i think it's the right balance for each sharing economy to thrive. british and americans are more scared about lending their cars. i'm not really sure, i don't know, but i heard that you teach kids "stranger danger" in britain.

and that is something that i absolutely don't know in france. so maybe less trust of people you don't know, and less willingness to share time, or things, with other people. you have been to london, then, clearly. you've described london. can you find a lost car? can you geo—locate it? with drivy 0pen, which is our big technological focus, now, we can geo—locate cars, see where the car is going, how it is doing. you can use the accelerometer to see if there were impacts. so you can do lots with technology. and basically, the future which is coming, which is all about connected cars, and then autonomous, cars is playing huge in ourfavour, because increasingly, the amount of data you have on the car, the control over the way it's driven is going to increase until it's autonomous, and then whoever is in the car is no longer a problem, except for sandwich crumbs or stuff like that.

in their early stages, start—ups like drivy famously use desks anywhere they can find them. and very soon, a lot of those desks could be here — in the biggest start—up incubator i have ever seen. goodness me! and that's because, when it opens injune, this 90—year—old paris train station will become the world's biggest start—up incubator. director roxanne varza has let us in early. what i like is these kind of "future pods" up here. what are these? yes, these are all meeting rooms. we have them throughout the building, and they're meant to be like shipping containers transformed into meeting rooms. so, massive glass walls on one side will stop tell me there will be marker pens inside... i hope so!

and they'll be... and they can put post—its all over it. you got a write on the glass. if you're a start—up, you've got to write on the glass. station f is full of big numbers. privately funded by an investor and telecomms entrepreneur, it cost 250 million euros. it has 3a,000 square metres of floor space. it's as long as the eiffel tower is tall. it will seat 3000 entrepreneurs, and that's just in the middle section! we haven't even got to that bit yet. so this part is the start—up zone. oh my goodness, that's just insane. and i'll tell you what, filling it with building dust like this makes it look awesome. and below us, we actually have showers, and lockers — if an entrepreneur wants to stay here all night, he can. what you mean if somebody wants to stay all night? that's the point of being an entrepreneur, you don't sleep for three years!

it may seem like overkill — it certainly does to me — but roxanne is confident that france can not only compete for start—up interest with the likes of the us and the uk, but in these uncertain times, it actually has an advantage. we've actually seen the impact of brexit, we've seen the impact of donald trump in the us, we've also seen — i mean,. silicon valley have been skyrocketing for the past few years. so we are seeing these elements start to play into where start—ups choose to build their companies. a lot of companies which would have previously looked at the uk are now looking at france, looking at other places in mainland europe, and in our applications procedure, we've had start—ups that have specifically referenced these as criteria when they were coming to france. france is currently second, behind the uk, in terms of both money raised in big data, ai, and other so—called deep tech in the last five years, and also in the size of its developer workforce. so it might not need a massive leap to become number one. everybody gets a locker?

everybody gets a locker, of course. i like this under lighting, that'sjust... yeah, the lighting is... do you think in france, there are more regulations, more red tape, more official stuff that you have to cut through? i do think that administratively, it is a place where there is potentially more complexity than elsewhere. i mean, it depends on what ecosystem we're comparing it to. the main problem i here in france is that things change. as soon as new administration comes in every three years, we're changing things that we have put into place. and start—ups cannot keep up. they can't every few years they have a completely different tax credit or scheme, so they need something that is stable and that they can count on. not that red tape is was a problem here. 0ne start—up, in a northern suburb of paris, has already been given

permission to place three of its pods around the city. so, what on earth is agricool putting inside these shipping containers that makes them so desirable? it is a strawberry farm! you probably know that fruit sold in city supermarkets has usually been on a long journey, over several days, to get there. and that means it has to be picked before it's ripe, and isn't as sweet or nutritious as it would be if it was left on the plant. well, this is a way of keeping fruit on the plant, in cities, until the very last minute. there you go, four walls of strawberries bathing under led lights. here's all the water that you need, which is pumped in, and then when it's finished, it's pumped back out again. it's a closed loop system. here are your nutrients, and over here, a box of bumblebees.

did you know you could order bumblebees by the box? i didn't. that's where they live, that's where they travel in and out, and that's where the pollination happens. agricool is currently experimenting with different colours of light and different mixes of nutrients in order to get the very best strawberries. well, inside each shipping container, we create a real paradise for fruits and vegetables. so best air, the c02 level, the best lights, with led lights. we can grow the equivalent of 4000 square metres in only 70 square metres. so it is like 120,000 times more productive, using 90% less water, using no pesticides, actually, and using only renewable energy. the two founders, both sons of farmers, have also noticed how tomatoes and strawberries that have been transported over long distances are tougher, in order to survive the journey. logistics is more important now than actually just

growing the fruit. so you know, they try to find the best pieces, that can last longer, they try to have larger skins. when the fruit, you know, decides to give more to the skin, then it decides to give less to the, you know, the fruit inside, and nutrients, and taste. just to be clear, these shipping containers won't move, they'll be permanent fixtures in cities. and with a minutely controlled climate, a new batch of strawberries can be grown every 11 weeks, meaning city folk can experience the taste of country living all year round. you know, i do want to overstate this, but if you think about the amount of agricultural land that is being swallowed up across the planet, everyday, this could be the future of farming. anyway, that's it from us from paris for the moment. certainly seems there's a lot going on here, doesn't it? we'll have to come back soon. anyway, in the meantime,

check us out on twitter through the week, @bbcclick. thanks for watching, and everyone back to mine for strawberries. hello there. with clear skies for many of us overnight, sunday dawns on quite a chilly note. there will be a touch of frost for some rural parts. this was the sunset on saturday evening, taken by one of our weather watchers in south ayrshire, showing the beautiful blue skies. cloud will increase across this part of the world as we head through the day on sunday, so turning cloudier across northern and western scotland, with a few showers. also some cloud across southern counties of england, and for northern ireland, too. it is, of course, the london marathon on sunday. after a fairly fresh start to the day, by the afternoon, temperatures in the mid—teens.

it should be fairly cloudy, but we are expecting it to remain dry. there is just the outside chance, though, of a passing shower in london. so this is 9am, then. you can see quite a lot of cloud across devon and cornwall, up towards east anglia, too, but there will be some brightness around. temperatures around eight or nine degrees at 9:00am, with some cloud across northern england and southern scotland, too. northern ireland starts off a bit cloudier, and that cloud also pushing in across the west of scotland, with some scattered showers across northern parts of scotland. now, moving through the day, then, not a bad day for most of us. it is looking predominantly dry, probably the best of the sunshine in a swathe through parts of northern england, the midlands, and across wales. a bit more cloud to the south of that, but most places staying dry. just that small hint of perhaps a passing shower in london for the marathon, of course, temperatures here up to around 16 degrees for the middle of the afternoon. further north, more in the way of cloud, and outbreaks of rain, too, down to the fact that we've got this frontal system approaching

from the north. that will bring quite a change in weather type as we head through into the new working week. first thing monday morning, in the countryside it, will be very chilly in the far north, particularly across parts of scotland. could be as low as minus four degrees first thing in the morning. and during the day, that cold air filters in across parts of scotland, then into northern ireland, too. some wintry showers in the north. further south, across england and wales, cloud, outbreaks of rain. but we are still in the milder air here, around 16 degrees or so, whereas further north, only around 6—9 celsius. then, as those fronts slip away towards the south, heading towards tuesday, colder air pushes down across all of us, so we return to a quite wintry feel during the course of tuesday, i think, with that cold, northerly wind. there will be quite a lot of dry, bright weather, with showers particularly towards the east, and a bit of a wintry flavour to those showers. temperatures at best for most of us around eight or nine degrees. could be up to around 13, though, in the far south—east. so that wintry theme continues into the middle of the week. still cold for wednesday

and thursday, with wintry showers and night—time frosts. hello, my name is tom donkin. a warm welcome to bbc news broadcasting at home and around the globe. here's our top stories — tight security across france — tens of thousands of police and soldiers on patrol as the country prepares for the presidential elections. a day of mourning declared in afghanistan after the deadly attack on an army base, that left more than 100 soldiers killed or wounded. emergency teams rush to stop an oil slick threatening the canary islands after a ferry slams into a pier, damaging fuel pipes. science fights back — doctor who joins the worldwide protests to combat what's seen as a political attack on hard facts. tennis star ilie nastase is banned from a major tournament after ranting at british players during the federation cup.