the day. this is bbc news, our latest headlines. jamie acourt, one of the original suspects in the murder of stephen lawrence, is arrested in spain on drugs charges, he'll appear before a judge today. donald trump criticises the level of knife crime in london, comparing one of the capital's hospitals to a war—zone an erupting volcano in hawaii triggers earthquakes, including the most powerful tremor to hit the state since 1975. nasa's latest mission to mars blasts off from california, it plans to map the red planet's interior, and listen for tremors, or marsquakes. now on bbc news, it's time for click. this week, the data that might keep the streets safe and keep the high street in business. plus, some beautiful music that won't scare the sheep. we're becoming aware of how

much data we give away without even realising it. our habits online can say a lot about our personalities. but when we're out and about, what does our behaviour in the real world say about us? well, in the uk, we're all getting used to the fact that we're being filmed by cctv a lot the time. but although a human can tell a lot about a person just by looking at video footage, that is a really hard job for a computer to do. that said, this system is having a pretty good guess at who it's looking at right now.

it's a very flattering guess, actually, but probably no worse than a human would guess given the same footage. this system is an artificial intelligence that researchers at southampton university have trained to estimate the gender, age and a description of everyone that falls under the gaze of their test cameras. we have millions of images, different types of people captured from different environments, from all around the world, and we hand—label these. they're labelled by human beings as male and female, or 16—30, and the magic part is that we can feed these into a machine, into a computer, to learn what it means to look male, what it means to look female, just from the visual cues alone. the team are pitching this at retailers, as an improved way of measuring footfall — instead ofjust counting the number of customers who come into a store, this can tell shopowners whether the right kind of people — the shop's target audience — are being drawn in.

rather than know that 100 people came in and they sold 50 things, we can tell them that 50 people of their target demographic came in and they sold 50 things. so now they know how well they are converting on certain types of people, who they may be targeting to sell products to. or maybe tell them that their sales are down even though people came into the shop, they're not selling as well because the right types of people aren't coming into the shop. retailers would get a breakdown through each day of the most popular spots in store and the most popular routes taken through the store by each type of customer. and with this high street view here, you can see which shop windows are more grabby and how long people dwell in different areas. in this example we can see carphone warehouse actually has a higher proportion of females walking past it than gap, on the other side of the road, which might indicate that maybe gap should move their placement along the high street as this side of the street sees more of its target demographic. this kind of profiling of humans by computer systems has many uses, from this kind of anonymised retail

analysis, to other areas that might say more about us as people. one of the more controversial uses for al is in policing. marc cieslak travelled to durham to find out more. peterlee police station in county durham. the early hours of the morning. the man pictured here in the station's cctv — let's call him steve — has been arrested for possession of heroin. i'm arresting you on suspicion of possession of a controlled substance. here in durham the police are trialing ai software which could help make decisions about suspects being held in custody. leave your shoes there, and we'lljust do a quick search. after steve's been processed, the custody sergeant will enter his details into a system called the harm assessment risk tool, or hart for short. it is an artificial intelligence tool designed to help custody sergeants make decisions about what to do with a suspect.

what it does, algorithmically, it uses all of our data to tell us who's high risk of reoffending, medium risk of reoffending, and low risk of reoffending. it's not absolutely perfect, but it gives us a really clear indication of who might commit crime in the future. the ai is trying to identify repeat offenders who, rather than being sent to court, will be entered into a rehabilitation scheme called checkpoint. we all recognise that when we place offenders into the criminaljustice system there is a revolving door of criminaljustice, so we wanted to look at, is there a better way, is there a different way, that can potentially produce more positive outcomes? this is the first time an ai system like this has been used in the uk. so what's the process then? i put my name in here... the system is now searching for the prisoner called meecham. the sergeant will click on the list.

the system has decided i am low risk, as a detainee. that is the screen sergeant be presented with. it says, "low—risk — the subject is not likely to commit an offence in the next month." what happens next? it can go either way, really. so if the sergeant has decided this person will be remanded in custody, they will be charged, refused bail and go to next available court, generally the next morning. it's a different story for steve. he has a long list of previous convictions — including drug possession, assault and driving offences. do you want a solicitor? nah. the ai assesses the data that durham constabulary holds on him and makes its recommendation. he can only enter checkpoint if it rates him as a moderate risk. a final decision around steve being sent to court or entered into checkpoint rests with the custody sergeant. we will continue to use our nous, our nose and our gut like we always have done, but what the hart does on top of that is, we have looked at ten years of data and that allows us to target the people,

in terms of our interventions we have developed, to make sure they don't commit crime in the future. everyone i've spoken to who works with the hart project is very keen to stress that the information it provides is advisory only and that a human custody sergeant makes all final decisions. but the use of this technology in general is, for some people, a cause for concern. this kind of artificial intelligence system in policing relies on big data. and that means people's privacy is at risk, and it risks us moving more towards a surveillance state. but it also risks discrimination, because patterns that exist in data already risk being perpetuated and repeated. and there's very little accountability over it. cambridge university's criminology lab is the birthplace of the technology being used

by the police in durham. it's been in development for five years. the decisions that hart makes are based on historical data. it uses this information to predict future outcomes. our artificial intelligence, regardless of whether it is the criminaljustice system or somewhere else, is looking to the past and the patterns we've observed, to predict the future. we know that the past was not perfect — human beings were making decisions. by the way, humans were making predictions at every stage of the criminaljustice system, from the first time we had thief—ta kers and the bow street runners. the system makes use of 3a different predictors, which include things like age and gender. but it also uses data from the credit reference agency experian, and it's this data that privacy campaigners find troubling. experian‘s data profiles individuals based on their postcode their household and even down to an individual level. and some of these profile

stereotypes include terms like "disconnected youth", "asian heritage", "dependent greys". and people are sorted into these categories. that's bad enough, but then that kind of profiling is being used to make decisions about freedom and justice in the uk. i think we really need to put the brakes on and say, why are we doing this? it turned out that experian variable was highly important, if we removed that variable from the model we would have lost a lot of accuracy. i will say that we are now about to install the next generation model which will not use this code. it's just a contractual reason. the durham constabulary's contract with experian has come to an end. back in peterlee‘s police station, steve has been assessed and accepted into the checkpoint programme. he ended up spending around eight hours in police custody. i will grab my stuff, come round the front

and we'll give you a lift. yeah, we'll go out the front. what is the future of this kind of technology? in terms of how i see it developing, i think over the next five years there will be a proliferation of these kind of tools, i think, going forward, society will come to accept them more, but human beings, government, society, needs to stamp its foot a little bit about it. and the reason i say that is because we need to have more regulation. it's taken me about a decade working in this field to realise that the real question is, what i always called the "now what" question. i can build you a model that will predict whatever outcome you're interested in, criminal justice—wise, but what are you going to do with it? once that box comes back and you have a red box on your computer screen that says "high risk" — now what? hello, and welcome to the week in tech.

it was the week in which the world's tallest tower in dubai created a virtualjump off the top — should you choose to accept it. iranjoined russia and blocked telegram and, with the harvest over, cambridge analytica shut down. ford revealed it's planning to let the blind see through car windows. this gadget converts the window to greyscale, the window then vibrates differently depending on how light or dark the scene is where you touch it. rather usefully, an ai assistant also tells the passenger what they're looking at. the boss of whatsapp is off — jan koum's not happy that owners facebook are trying to commercialise users‘ data. lg had its biggest phone launch of the year, the g7 thinq sports an ai camera with 19 shooting modes. don't worry, the ai picks the one you're most likely to need. and finally, take a look at what could be the most beautiful epic fail ever.

this is the stunning display created by chinese firm ehang, who broke the guinness world record for the most drones flown simultaneously. the problem? well, the aircraft failed to spell out the date and the record—setting number of drones perfectly. an "epic fail" according to the country's own south china morning post. tough crowd! so, we've been talking about the power of data and probably no—one has more personal data on you and me than you—know—who. yes, at facebook‘s f8 conference this week, they were telling us their plans for the platform for the year ahead. there will be new face filters — hmm, i wonder where they got that idea from(!) a new vr headset, and a dog on a laptop. thanks, jiffpom!

nice work! but there wasn't just a dog in the conference centre. there was one very big elephant in the room as well... welcome to f8! this has been an intense year! privacy. it has been centre—stage for facebook so far this year with zuck appearing in person before congress to defend facebook‘s privacy practices. and this week, the company sharing that scandal spotlight with facebook, cambridge analyticia, announced that it was shutting down, saying it had been vilified by unfounded accusations. nevertheless, facebook‘s feet are still very much to the fire as questions heat up around how our data is used. and what i've learned this year is that we need to take a broader view of our responsibility. facebook‘s opening salvo, a new feature called clear history. we're starting with something that a lot of people have

asked about recently, and that's the information that we get from websites and apps who are using facebook‘s advertising and analytics tools. the new tool, which will not be available for at least a few months, is an attempt to answer some of the harder questions put to him by congress. facebook already offers this tool which lets you download the data that they hold on you. the problem is, it's not all the data that they hold on you. via facebook like buttons and also using hidden facebook trackers installed by the owners of many websites, facebook can follow you as you browse much of the web, and it's accessing this data which is uniting privacy advocates and congress alike. "clear your history" is bit misleading. all they are doing is actually disconnecting the history, the browsing history, from the profile, from the account itself. the data will still exist. the information that you went to website one, then website two, then website three will still exist

and will still be stored in facebook‘s data bases. the only thing is that it will not be linked to you directly but it will be linked to some other identifier and possibly alongside that other identifier will be kept other data about you. and while facebook might not be so lucky in privacy, maybe they could be luckier in love? we are announcing a new set of features coming soon around dating! cheering and applause. now, this is going to be — this is going to be for building real long—term relationships, all right? notjust hook—ups. zuckerberg promised to bear these privacy issues in mind with the new service but would you like the idea of facebook getting even more intimate with you? a few years back, wearables became the buzzword.

but this year, there's been a lot of talk about hearables. now, that could mean a personal training session or real—time translation directly into a pair of earbuds. but this week, i'm putting to the test a few devices that aim to give you a hearing test and, as a result, optimise what you're listening to. even for those of us who are unaware of having any defect, the chances are our lifestyles will have had some impact on our hearing and due to this, we don't all hear things in exactly the same way. we have a huge range of hearing, from 20 hertz to 20,000 hertz, and there are various causes of different types of hearing impairment, so we could have a hearing loss through ageing, it could be through noise—induced hearing element as well. but can some headphones balance this out, and do we actually need them to? i popped into one of our peaceful radio studios to find out. so first of all, i have these audera headphones. now, i need to do a hearing test to create my profile.

what we're doing here is finding the quietest part of my audible range throughout all the different frequencies. so, let's get started. that's it. it takes about ten minutes to go through this whole process for a full range of sound on both ears. ok, so the results of my test, i can tell that each ear seems to hear differently from each other but beyond that, obviously, it doesn't mean a huge amount. but what i can do now is i can put the headphones to the test. ok, so it says here the first time that you experience this personalised sound, it may be very different from anything you have ever heard before. so it's — oh, it also says that it may be "overwhelming" for some people. shouts: ok, sorry if i'm shouting! this is at 0% now! let's apply 50%! wow, it sounds a lot cleaner!

the sounds a lot sharper! you can hear each element of the sound really clearly! §iie ie£ gugiléé ii l222 5 e5212. . l 7. . , ... . . been around a few years. , aftercréatifig’wfirfifim—e” ” ' "“"’“*,’ it aims to optimise the music you listen to through any wired headphones. just inputting your age does the job to some extent,

although i ended up more impressed by the way you could tweak the sound around you. here i have the nurophone headphones which look pretty interesting for a start as they're sort of in—ear and over—ear. but they work differently. instead of asking you whether you can hear something, they do the test for you, and they do it in just 60 seconds. they claim to do so by sending sound waves into your ear which will trigger a reaction, sending electrical impulses to your brain and sound waves back out your ear. it's through measuring them that the app will create what it calls your hearing signature. in my not—very—scientific experiment here, i am noticing a much bigger difference between the generic and the personalised in these headphones. the music sounds totally different. it's different parts of the music that sound louder. and that's mixed in with just a real clear, crisp sound. but our expert had some questions over this upgrade of sound quality.

they do give you the opportunity with the headphones to be able to compare the generic settings with those taking into account your personal profile. there was a hugely marked difference between those two things when i actually tested them out on my hearing, which actually prompted me to go downstairs and use our diagnostic oto—acoustic emission test and see if i had normally functioning ears, which i did, so in terms of the reliability of that, in terms of the accuracy of how they actually come to those conclusions, i'm not entirely sure. but would i want either of these over another pair of headphones at the same price point? maybe the fact is that i don't need them. if my hearing was a little more damaged, there would be greater rewards to reap. that was lara. and now, we go to one of the most remote communities in the western world — the faroe islands, a nation with more sheep than people. but residents there are being given access to a new piece of software to help magnify

their musical talents. here's paul carter. when you think of parts of the world innovating in technology, a rocky collection of islands in the north atlantic might not be the first place that springs to mind. but the faroe islands, situated roughly halfway between scotland and iceland, are trying new ways of doing just that. we talk a lot about the power of technology to bring people closer together. well, the government here are experimenting with new ways to bring education to people across these islands, and bring the world a little closer to them. this remote collection of 18 islands are actually no stranger to technology. as well as leading mobile phone 4g connectivity in partnership with chinese firm huawei, they've also built a reputation for taking on the tech big guns and winning. more on that later. but it's their experiment with tech to enhance their cultural heritage that brought us here. the faroese government has just

announced that it will be making music education software meludia available completely free to all of its 50,000 citizens. so there's only one really specialised high—level music school here in the capital, in torshavn, but people living on other islands can't have that. so this is a perfect country to use technology to spread music education and music literacy throughout all of the 18 islands of this country and make music accessible to all. the web—based platform aims to teach music in the same way as a language and claims to be beneficial to everyone, from children to people with learning difficulties, right up to professional musicians. we don't have access to the big universities or the best teachers in the world if we don't use the digital platforms in any area you could think of, so we are very fond of the digital possibilities for our citizens. they sing. it was not that difficult to get the government doing this because we are very proud

of being this musical nation. we have, like, i don't know, ten brass bands, you know, in a population of 50,000 people. in 2016, the islands made worldwide headlines when its own version of google street view — named sheep view — resulted in google mapping the islands for its service. but they haven't stopped there. now when we have more and more tourists coming, they are also quite interested in our language somehow, but we were not present on google translate this time. so we thought that we — well, we should give google another go and ask them if they could put the fa roese language on google translate. they established faroe islands translate, an online service in which requests were sent to faroese volunteers, who recorded the translations on video and posted them on a dedicated website. as well as a useful tool to promote the islands, they also hoped it would again add pressure to google.

try it, and you will learn that we have a0 words for fog. "toka". "skaltova". as yet, google hasn't bowed to pressure a second time. we don't have the budget the uk have, for example, so we need to find something that works for us and this works very well. it gives us the attention we wanted but most of all, it shows our culture and our people. but why is such a remote part of the world so keen to stay connected? a part of it is to tell all the world that we're here and we have a language and we are a country and you should come visiting us, or you should go and google us on the computer because we are also here. hello! that was paul in the faroe islands, and that's it for this week. don't forget, we live on facebook and on twitter, @bbcclick. you can find loads more from us there every single day. thanks for watching and we'll see you soon. hello once again.

it is time we brought you right up to date with how we see the rest of the bank holiday weekend unfolding right across the british isles. no complaints, i suspect, from the oldham area. it is notjust darren‘s sky that is looking like that, many of you are enjoying a sparkling saturday, however, there are exceptions to that rule, most notably round about some, and i repeat "some" of the irish sea coast. that is the view in one or two sports but even here, there are blue skies to be had if you have not got that sea mist and fog coming in and out with the tide and in and out with the breeze. the weather front across

the northwest of scotland, i think more of an ever present to give more in the way of cloud, some bits of rain as well, it will be there overnight. as we come away from that, the skies stay pretty clear across the south—east, and east anglia. here, on the sandy soils, we could be down at two or three degrees, and there is not a great deal of change. i have changed the day. we're now into sunday. still the murk is a potential threat around the irish sea coast, getting into towards the solway firth, into the eastern shores of antrim and county down, there, more extensive rain as the weather front closes into the more northern part of scotland, but the eastern side of scotland, much of england and wales, northern ireland, too, perhaps a fraction warmer than was the case on saturday, and as i take you from sunday on into bank holiday monday, this air stream is still the dominant flow, dragging warmth out of the heart of the continent, and pushing it towards the british isles, so, yes, there is

cloud and the odd bit of rain to be had across northern and western parts of scotland, cloudy into northern ireland, not without brightness here, still the potential for murk around some of the irish sea coast, but it could well be that we see another degree to those temperatures if we make it up to the lofty heights of 26, possibly even 27 degrees, that will set a record for the bank holiday monday, of the bank holiday. 27 degrees will be the mark we are looking for and that is probably the one that will make the headlines. having said all of that, it may well be the case that some of you do not get anywhere near that, and on tuesday, we will still have cloud across many of these western areas, still producing the odd bit of rain and even as far ahead as that, eastern and south—eastern parts are still very warm. this is bbc news. i'm lukwesa burak. the headlines at 4:00pm. jamie acourt, one of the original suspects in the murder of stephen lawrence, is arrested in spain on drugs charges, he'll appear before a judge today. donald trump criticises the level of knife crime in london, comparing one of the capital's hospitals to "a war—zone". they say it's as bad as a militarily war zone hospital. knives, knives, knives.

an erupting volcano in hawaii triggers earthquakes, including the most powerful tremor to hit the state since 1975. and... we have lift off. nasa's latest mission to mars has blasted off from california, it plans to map the red planet's interior, and listen for tremors, or "marsquakes". and those controversial president trump comments are discussed by our dateline london panel. that's in half an hour, here on bbc news.