hello, this is bbc news, the headlines: president trump is in scotland to wind down and play golf after completing his two—day working trip to the uk. thousands take part in protests on the streets of edinburgh in a second day of rallies against donald trump's uk visit. an explosive device has been thrown at the former sinn fein leader gerry adams‘ house in west belfast. nobody was hurt in the attack. a large—scale investigation continues in wiltshire after police identify the source of the nerve agent novichok — it was found inside the house of one of the victims. and on the verge of a 24th singles grand slam — serena williams takes on angelique kerber later in search of a record—breaking victory. now on bbc news, it's time for click. fed up of the football? your team has gone out?

well, let's talk cars instead. this week we are at the grand prix. we are in a do—it—yourself driverless car in india. and someone getjen a new umbrella. the seconds wound down before the start. 2a drivers step hard on the throttle. formula 1 has been at the cutting edge of technology and design since its creation in 1946. welcome to the pits. every year teams compete fiercely to outdo each other in aerodynamics, data communication and materials, all with one aim.

to make their cars go really, really fast. and they do a really good job of making them that, as we are finding out here at the austrian grand prix. lewis hamilton's ride. what is even more impressive is that this whole show is permanently on the road, with cars, teams, engineers and scientists moving from country to country and track to track. now these are the most expensive motor homes i've ever seen. each one of these is a glory, and theyjust drive them to the next formula 1, stick them together, zip, zip, zip, and that is it. and ahead of the base here in spielberg, austria, the cars are being prepped, tweaked and tested around the clock. mercedes are the current world champions, and like every other team here, they spend millions on their car and developing the technology that will hopefully win them the race. but what you see at any grand prix

is just the tip of the iceberg. it takes hundreds of people to develop the technology. so we went to mercedes hq to find out what really goes into winning a race. away from the track, the people, the planning, the preparation and the precision are pivotal. hi, i'm from the bbc. hello. can ijust put a security sticker on your phone? of course, no problem. so we are allowed to film here but i mustn't take pictures on my phone! there is clearly a lot at stake here so it is no formula 1 is notoriously secretive. but today we have got some behind the scenes access. this business is big bucks and millimetres and milliseconds matter.

this is chassis numberfive, last year's winning car. in fact it hasn't even been cleaned since its last race in abu dhabi. but the thing that is most striking standing next to it is the amount of detail there is everywhere throughout the car and after each race, if there is something they are not happy with, it will be perfected. this was a winning car last year so it has been very successful, but you are obviously not happy with it because you are working on a new one. so what do you think needs to be improved? we are never happy with it, as you say. this is lewis's, from last year. it was the first car we made on the back of a really big regulation change. we worked really hard on all those little small bits you see. the aerodynamic bits and pieces. it is made up of lots of little small bits. yeah, every little bit has a job and we put it in and each one

is about optimising the airflow around the car. but we are not happy with it here because we focus on so much on that, we now need to do a lot on the packaging to make it much tighter. the tighter you get it, the better you can get the aerodynamics around the car. on top of that as well we think we can do improvements around the cooling. those big black ducts around the side is where the air goes in to cool the engine. we think we can do some do some improvement around that area as well for next year. well, there is so much money at stake here. how much does it cost to create a car like this? from the beginning of the process, all the way through, what sort of figure would you put on that? well, i can't tell you the exact figure, but what i can tell you is it is in the millions. are we talking tens of millions? tens of millions, yes. tens of millions? over 50 million? close. crikey, i wouldn't want to pay the insurance premium on that! the operation here goes way beyond the car itself though. welcome to the race support room. when the race is actually on, 16 members of the team are allowed to be at the track. so this provides the opportunity

for more people to be looking at the data and making sure that vital advice can be provided. on the screens they will be looking at a feed from the race. they will also be looking at feeds from within the drivers‘ cars, plus all the vital data they want to act on. and if they want to communicate, then they simply do it through a pair of these. lap times, gps data, everything can be tracked and analysed here where 5,000 different data points are being assessed. information from races in europe taking just 0.1 of a second to reach here, or 0.4 if the data is coming from australia. meanwhile, this lot are busy practising at speed. over 250 of these trials take place ahead of the season. they make it look easy, but inevitably it is not, as i can tell you first hand. oh, no!

it is meant to be so quick, but i clearly wasn't. living life in the fast lane. thank you, laura. and by the way, this is how you really do it. this year mercedes has got its pit stop down to an incredible 1.85 seconds. now that is quicker than it takes to say 1.85 seconds! it's a finely tuned operation and the engineers practice over and over in the days before each race. it is a bit of a ballet and the ergonomics are quite important because we are speaking of 20 odd people around the car, trying to do a job in two seconds.

and if you start banging into people then you lose half a second, a second and then the strategist can't get their numbers right and then you don't get the position you need. the human element to this ultrafast manoeuvre is accompanied by technology, individually developed by each team. even the hydraulically powered wheel guns are a closely guarded secret. i hear they are quite expensive. they are expensive and they are under an awful lot of pressure, so we are changing the internals a great deal. do i hear about £30,000 each? i wouldn't know the exact cost, but that sounds quite low to me. we're going into the mercedes garage now. keeping the pit crew safe is of utmost importance. these lights for example let the crew know if the cars have become electrified, stopping them from getting more than a nasty shock. and then there is what goes into the car. more specifically, what comes out of the cars, which is monitored by track—side labs and high—end

scientific equipment. between every session, the cars are given the equivalent of a blood test. the oil and the fuel is taken to see if it is contaminated, and that might give you a clue as to the state of the engine. and that is done in the fuel lab. the oil is put into a spectrometer which tests for different metals in the fluid. the amount of a specific metal present can reveal if a particular part of the engine is degrading too quickly. yes, these may be some of the most skilful drivers in the world, but i wonder if even they would struggle with driving in david reid's neck of the woods. ok, here we go. this is maximum chaos! this guy has just overtaken me on the inside.

it's crazy! a car sandwich. yeah, that's me. thank you. diving here is tough. i reckon if western autonomous car makers came here, they would hide in their hotel rooms. but indian inventors, they see the chaos on the roads here, and they want to take it on. look at this mobile footage. this rickety second—hand suv has been made single—handedly into a self—driving car. it's a bit rough, but it makes it down the sort of road that gets wing mirrors very worried indeed. this is the man behind it. a us—educated a! specialist. he says the maths that navigates his car, the algorithm, has been designed specially for india's nightmare roads. indian traffic is very chaotic, so it is very hard to predict. once you have solved that prediction problem, then you can apply that in any environment and it will work because you already tested it

in the most difficult conditions possible. today there is a hitch. the car is refusing to drive itself, so he takes the wheel. top—end driverless cars cost a bomb. they are developed by big teams, have pricey radar and lasers and use big data maps to find their way. this one is cheap but not short on brains. his off—the—shelf cameras talk to an algorithm that reads the road even without maps. india's government is against driverless cars, because they fearjob losses, but the technology being developed here could still travel far, especially with the advent of artificial intelligence. now, whether or not at some time in the future india will have driverless cars is very debatable. however, the same technology can be used to make india's roads safer. many here place their faith

in dashboard mounted gods to protect them. but with 150,000 dying on india's roads annually, driver i, a hazard warning system developed in bangalore, might also merit a look—in. so why did he go there? it is too close and it was detected. and it is just as well because they were policemen! driver i is a clever back—seat driver. so this is the front camera. it measures acceleration, orientation and has ag, but also artificial intelligence. it learns what is safe and what is not. it is helping indian truckers drive better. we are tracking every single bit of the road and we are basically measuring any unsafe and identifying any unsafe event. we are actually identifying what the driver's manoeuvre is and if the driver's manoeuvre corresponds to a positive manoeuvre or it was actually something that the driver can improve upon and the driver did something

that could be considered unsafe. like our run—in with the cops, we got the video because driver i sent it back when the warning sounded. 0ne rather surprising area where driverless technology is making inroads is actually off—road. in chennai, one of india's main car makers is developing self—driving tractors in response to low crop yields and the lack of farm workers. tractors can work around the clock, just what you need when you are up against a short window for sowing or harvesting. it has to happen right at that time, otherwise you can actually use the entirety of the season. it's not an easy piece of equipment to drive because you don't want the wheels to run over the

seedlings, so you need consistent operation, and that can only be done by technology. on or off road, self—driving tech has incredible potential, helping out farmers, disciplining unruly drivers, and harnessing chaos as a test—bed for even smarter systems. hello, and welcome to the week in tech. this was the week that facebook faced a fine of £500,000 for breaches in the cambridge analytica data scandal. and we've learnt the scale of apple's autonomous vehicle ambitions. stolen trade secrets has revealed that 5,000 of the company staff know about the project. the smartphone supremo has remained notoriously tight—lipped on the issue. across the channel, a family in france have become the first to live in a 3d—printed house.

their cement filled home in nantes was built in just 5a hours. but the city's university and council behind the project think they could do it all again injust 33 hours. its curved walls make the property less humid, and the construction costs were 20% cheaper than using traditional methods. it was also the week chip—maker nvidia showed off its photography skills. using deep learning, it has trained it a! to fix grainy or corrupted images. amazingly, it has learned how to do this having only seen corrupted ones. this means it could make restoring your pictures easier in the future. magic! and finally, mit have designed a musical instrument specifically for space travel. it contains chimes that are equipped with gyroscopes that change sound depending on how they are shaken. it allows budding astronaut musicians to beat the box in zero—g. the stats for formula 1 are mind blowing.

these cars come around this track at over 350 km/h, and that is why 350 million fans tune in to these races. but attracting new viewers is a bit of an issue for this sport because watching these cards go around and around and around and around can get a bit boring. formula 1 are aware of the problem, and part of their strategy is to use all the latest tricks and technologies and technologies to pull in new fans, especially those who play racing video games and are used to feeling like they are really sitting in the driving seat. sport broadcasting technology is moving at such a pace. we are talking about 3d, 360, virtual reality. that is a big talking point at the moment. mixed reality is quite nice as well. whether that is bringing in actual

footage against the cg! world. the demographic for a formula 1 fan, i believe, is a middle—aged man. we want to make it available for young people, boys and girls, all sorts of people. this year every formula 1 car has one of these cameras right on the front. that is correct. why have you done this? to give the public a more interactive feel. you can actually go wherever the action is, and if you record it, you can watch it back at whatever angle you want. and have you tried this? what's it like when you actually look through the goggles? we haven't found anybody who hasn't been wowed by it. it is our intention that you can pick your favourite driver and have an experience with him going around the track. but while this may be a great experience for the viewer, the teams, which consider every centimetre of these cars,

might not be so happy about formula 1's mandatory addition. the original camera we used was the size of a cricket ball, but this obstructed the driver's vision, and so we repackaged it, and this is the design we came up with. and i think the balance of what you achieve the good outweighs the bad. and the experience is not just about what you see, it's also about what you hear. as a formula 1 cars have developed, that iconic engine has died down. steve and the team plan to rev it up once more. it has been a long—held desire of our audio department to mount a microphone in the exhaust. how hot does it get inside the exhaust? up to 360 degrees. this is a microphone we had on lewis hamilton, and it touched the exhaust and you can see what happened to it. now it has to live outside of the bodywork. it has a heat resistance of 1000 degrees, i think. when they come to a corner and they change down, and they make that engine noise, before it wasn't very emotional. now when you listen to it,

it really is a rasp. it's a really emotional sound. we have had lots of feedback from around the world, from broadcasters, and everyone loves it. even broadcasting these races is a huge operation. from australia to bahrain to china, the broadcast centre needs to be built in a matter of days to beam this race out to more than 200 countries. the most amazing thing about this broadcast centre is not all the screens and all the technology, impressive though it is. it is the fact that at the end of the race you just fold up these desks, put a lid on it and it is already in a load of aircraft containers ready to ship to the next race. there is about 200 tonnes of equipment in this building. it takes up about two 747s and 2a trucks, effectively. how quickly can we get from one race to the next race?

i think it is the biggest mobile broadcast centre in the world that moves so often. we come along, there's a concrete patch, they provide us water, and away we go. we build our whole... last sunday you finished a race, and by thursday you have come all the way to austria and you are up and running. exactly. and next thursday we will be in silverstone, fully ready... look at the man! he's not even breaking a sweat! it's like, yeah, whatever. and actually it looks like the most stressfuljob this week is being done by our star in a reasonably priced, if somewhat weather—beaten, car. yes, spen, lam braving this hurricane in cologne, germany, to experience europe's

most advanced weather testing centre for cars. ford have built the $108 million facility to see how it popular models fare against the most extreme conditions on earth, from altitude, humidity, winds and driving rain. there are three wind tunnels here. and capabilities of testing up to ten cars at once. i pretty much control this facility, and i conduct those tests. we have sensors for relative humidity, temperature, and for the airspeed, which is measured from differential pressure from the nozzle. first, we are going to see what it might be like to drive your car in a rainforest. it get up to 55 degrees in this room, and the humidity goes up to 95%. this is one of four temperature—controlled test chambers,

complete with birdsong and fake palm trees to simulate a tropical environment. it is baking in there! that is so hot! from extreme heat to extreme cold. oh, that is the snow room. these doors are really heavy. it's about minus 17 degrees in here right now. but the temperature can be set to go as low as minus 30 degrees. minus 30 degrees, of course, is rather important for cold starts, it is important for issues for the heating system, for comfort and for safety of course, because we have a defrosting of the windshield. they are also testing how the windshield wipers operate under heavy snow. the snow is falling from above and can test the maximum stress on part of the car. this is impressive! it is testing the weight of the snow on the car. because this is actually a realistic situation in some parts of the world, to get a big snow boulder on the...mirror! next we're going to see how cars are tested in hurricane conditions.

we have climactic wind tunnels, so we always control the wind speed to simulate that the car is actually moving on the roads. so it is actually 156 km/h winds out there now. it can go up to 160 km/h. it is testing the automatic function of the windscreen wipers. whether or not there is an equal amount of time going between each blade. the tunnel doesn't just test the rain and wind but also the effect the sun has on the car in extreme conditions. it is set up with 28 spotlights with 4000 watts bulbs to mimic sunlight. the solar system is always interesting when it comes to heat that affects our power train and performance. that really looks like being outside in the bright sunlight. it's pretty much brightens my day every time i can use it! the ability to test cars at high altitude while also simulating challenging weather conditions

is the unique feature of the test centre. they can be heighs of 5200 metres. engineers even have to take breaks when they are finished working in this tunnel. more than half of our vehicles are sold in markets with altitudes of more than 1000 metres. we can also simulate here pulling a trailer up the hill on different altitude levels. testing the power train regarding what is happening in terms of temperature, how that is developing and making sure that the car is safe. well, we have seen everything here and i for one am looking forward to getting back to some nice british weather. that wasjen. and that is it from the austrian grand prix. i hope you have found it as thrilling and strange as i have. you can see a lot more photos up on twitter. thank you very much for watching

and we will see you soon. good afternoon. after some torrential storms on friday, blue sky and lots of sunshine for many of us, this was the picture in north yorkshire, and through the remainder of the weekend that continues for the majority of places, dry and pretty ha rd. a the majority of places, dry and pretty hard. a bit of rain in the forecast particularly for the north—west of the uk, but england and wales not seeing much rain, may well be hoping for some rain for your gardens. this weather front is

a fairly weak affair, heading into the north—west, bringing more clout to western parts of scotland, heading into the light of the manor and down, you can see that on the satellite image. elsewhere across the country, any clouded by weather cumulus bubbling up, just a small chance of an isolated shower across some areas, but for most of us a dry into the day, overnight cloud building across scotland and northern ireland with a few splashes of rain working in here, eastern scotla nd of rain working in here, eastern scotland stays dry overnight, dry and clear further south, but scotland stays dry overnight, dry and clearfurther south, but muggy. temperatures staying in the mid—teens, quite an uncomfortable night was leaving once again. sunday, similar to what we saw on saturday, particularly for england and wales, lots of sunshine, and a hot day, lots of sunshine in eastern scotland, although elsewhere for scotla nd scotland, although elsewhere for scotland and northern ireland, a cloudier, cooler day, on and off outbreaks of rain on the week weather front, temperatures around 17-21, weather front, temperatures around 17—21, further south 28—29, possibly

30 in12 17—21, further south 28—29, possibly 30 in 12 spots. it is the men's final at wimbledon tomorrow, it could be the hottest men's final in over 20 years, could be the hottest men's final in over 20 yea rs, lots could be the hottest men's final in over 20 years, lots of sunshine there, peaking in the high 20s, fairly uncomfortable. through into monday, that weather front tracks eastwards a cross monday, that weather front tracks eastwards across the country, although it will bring some rain in two parts of northern england, wales, the southwest too, pressure conditions behind that, some showers turning heavy and potentially thundery through eastern part of england. still hot in the south—east on monday, turning fashion across northern and western parts of the uk. the theme into next week is for a fresher feel to the weather working further south, still sunny spells, but a chance of a little bit of rain at times too. bye—bye. i'm ros atkins in turnberry on the penultimate day of the us president's uk visit. we are into the last 2a hours of his time in the uk. he is staying at his

luxury turnberry golf resort, which you can see behind me, and he has had a mixed reception on the cause. booing. the working part of the uk visit is over. there is no schedule of events for today, but we knew the president would be playing golf, and protesters wanted to keep him company. we haven't just protesters wanted to keep him company. we haven'tjust seen protests on this part of the west coast of scotland. we have also seen a turnout in edinburgh, and we'll hear from a turnout in edinburgh, and we'll hearfrom some of a turnout in edinburgh, and we'll hear from some of those protesters in the next few minutes.