hello this is bbc news with joanna gosling. the headlines borisjohnson arrives back in the uk as speculation grows he'lljoin the conservative leadership race it's expected the former chancellor, rishi sunak, will announce his candidacy shortly. the leader of the commons, penny mordaunt, is the only person to formally announce her candidacy so far. in other news, at the china congress, president xi's predecessor hujintao is mysteriously led out of the hall by officials. giorgia meloni has been sworn in as the head of italy's latest coalition government. she's the nation's first female prime mnister — and its first far—right leader since the second world war. now on bbc news...click

this week, shona has been to sweden to see how new organs could be printed in a lab. meanwhile, lara has been creating body parts of a different kind. what's happened to my ear? nick talks to a man in a box. and the man hunting the missing cryptoqueen explains how to find someone from a single selfie. even if i posted a picture of me in my back garden, there is a possibility someone could work out my home address, because i've done it to them. nearly 7,000 people in the uk right now need organ transplants. sometimes the wait for these lifelines can be long and agonising. and not everyone survives them.

we clearly need more donors. but 3—d printing might be able to offer a solution. yeah, scientists are developing a method to create organs from living tissue, which can then be transplanted into patients who need them. and shiona mccallum has been to gothenburg, in sweden, to find out more. it's been more than 70 years since the first successful organ transplant, a kidney. the chances of further operations of this kind being conducted. people who want to donate their organs can have their names put on a computer by using, for example, a new type of driving licence application form. and thanks to the donor register, hearts, lungs and livers are now among the 100,000 organs replaced every year. when you lose someone and they've given that gift, that huge gift, you are immensely proud of them. but even now, it remains a difficult wait for patients.

it tookjust over a yearfor me to get my transplant, and i deteriorated a lot during that time, and i was constantly in and out of hospital, getting weaker and weaker, and, so yes, it was a terrible, terrifying time. here in gothenburg, one team are trying to solve this, and they're using technology that's a bit like a 3—d printer. theiraim? well, it's to grow organs themselves, here in this lab. no donor necessary. today we are going to look at printing skin. the skin is composed of different layers. 0k. and every layer has different types of cells and combinations. it is the human body's largest organ but even a small skin model requires millions of cells. they're mixed into different bio—inks for the machine to choose between. you really design

a code, what tells the printer what to print, when, and in which structure. it's a lot more visible than i expected with the naked eye. a hollow blood vessel structure has been layered inside this one, and a syringe—like printhead has a different purpose. so you can actually print cells for hair follicles to really replicate the skin. at this stage it kind of looks like a bit of toothpaste, but actually, it is seriously complicated cells in here. while 3—d—printed skin could be applied in surgical grafts, drugs and cosmetics testing, the cells have to mature first. this is what we've printed. they are kept in incubators for several weeks, and this tray is about a week old. the tough part, which is mimicking the top of our skin, is on top. a mix of proteins and nutrient molecules is fed in and the waste is removed.

all while being closely monitored. the beauty with this microscope is you can actually watch your sample through an ipad, so it's no longer looking through those small eye things. green dots for living cells, red for dead. so there's not many dead cells here. which is a very good sign. close analysis of the end results is needed to finetune. cellink has been printing cancer tumours, so that patients can receive personalised treatments without enduring drug trials themselves. they've also made liver models for drug screening campaigns, and are helping beauty brands become animal cruelty—free thanks to testing on lab—grown skin. in this gothenburg hospital, researchers plan to put such bio—printed cartilage in patient with muscle issues in just a few years. first patients is of course the sports injuries, because they will

probably heal better, at least we think so, but also for elderly patients or patients who suffer from osteoarthritis. we get a very nice cartilage tissue that have healing capacities, so we are very optimistic. further studies are needed to prove the methods are safe, but it could save time and money. we can actually print what the damage it looked like before. we can actually print directly into the knee, probably, in the future. we can mass—produce it, i mean, we can start with a printer and go home and make thousands of copies. and more complex procedures are coming down the line. what do you feel is the ultimate aim? many people die waiting in the line for organ transplantation, so what we are hoping is that this technology in the future will actually be able to provide these organs. how far off are we? i think 15, 20 years is when we might see it in clinic. simpler organs can be seen very, very soon.

but if we're talking a full organ, internal organ, that will take some time. one of my oldest friends is alive thanks to a donor liver. to not have that over—a—year wait, to know that they would be potentially brewing and organ for me, if that's all it took, i would have been in a stronger place to have the operation it stops a lot of the worry, i would imagine, because you know it is there. unlike this waiting game that you don't know when it's your turn. would you feel differently about having an organ that didn't mean that someone had to die? you're waiting for somebody to die and you're waiting for that person to be in the right blood group, the right size. you know, i couldn't have a 6'8", massively obese gentleman, because it wouldn't have fitted in my abdomen, so if you're able to eradicate all of that and then almost home—grow your own to the exact

perfect fit, yes, i think it would be life—changing for thousands of people. there is a way to go yet, but the first steps from skin cells to mending muscles are promising. i won't be the only one hoping lab—grown organs could cut the queue to life—saving operations. over the years, video calls have got better and better. recently, they've got so lifelike, it's ridiculous. it's ridiculous. do you remember portl? this is you in a box? yeah, that's me in a box. this is an la—based start—up that was building, to be honest, the closest thing to holograms that i think i've seen. they've since renamed themselves proto, and now they've come up with something that promises to take up a little less space in your living room. and nick kwe�*s got an early peek.

it's crossed contintents to be here, and today it's making it's all—singing, all—dancing, star—studded debut. and my honest reaction? utterly gobsmacked. this is weird, isn't it? to the proto team, happy cinco de mayo. watching the tabletop—sized box is like watching a 3—d movie, without the glasses, but with shrunken characters and objects appearing like they are physically inside. why, hello there! 0h, hi! when spencer interviewed me, i showed him the non—working prototype. it was only a vision but here i am, beaming into an actual working device. i can't believe i'm actually speaking to you now, live in la! i'm actually not a hologram, i'm really in this thing! let me out! we wanted to go from the boardroom and the conference room into the living room. you shouldn't have to be a millionaire or a celebrity, or digital resurrection

of a late legend. this should be so grandpa and timmy can communicate, whether they are ten miles away or 10,000 miles away. looking a lot smaller than i recall. when a volumetric, real—sized person, even shrunk down into a tabletop—sized version of a person, materialises into a space, there is a much more emotional connection that just does not exist when you are just chest—up on a flat, 2—d display. this is sort of like if zoom and being there had a baby. it's the real empty space within the box, the shadows on the inside walls, and the reflections that create the illusion of physical presence. 0h, paris hilton! i am so excited and proud to be a part of this! i am looking at paris' eyes, and she's looking back into mine. and wherever i am, looking around the device, we are maintaining eye contact. a trick, thanks to the box�*s depth. what about that physical connection that you have

with people when you meet them for the first time, orfor a business meeting? people are no longer getting on an aeroplane and travelling from city to city to city, and spreading jet fuel over the earth. as we're well aware, video calls can be temperamental, with even the slightest of delays putting us off. but this is fairly slick, even while hotspotting over 4g on my phone. we've gotten the transmission to around 200 milliseconds. which, perceptively, is instantaneous to anybody interacting. many holographic devices, as you see in the acquisition, is super complicated. it requires multiple cameras, multiple angles, a chromakey device. we are able to achieve a holographic transmission with one camera. today, david is being captured at his professional studio, but they are working on an app so people can record themselves from their smartphones, and eventually they want the m to do the recording itself.

its front—facing camera could be very smart indeed. we have technology that's being deployed very soon to do automatic demographic and age recognition, so we can even understand if you are male, female, your age range, and serve your content to that effect. it will cost around two grand when it hits the mass market as early as next month, but proto is already working with big brands to help them flog stuff, and is also entering the health and education sectors. they are using it so doctors can beam in and train future healthcare providers hwo to treat and diagnose people. they're teaching students at multiple universities at the exact same time! david, thank you so much forjoining me. all right, beam you later! that was nick, and now it's time to look at this week's tech news. the uk's competition is a markets authority has

again ordered meta to sell giphy. they found that owning it could harm competition. this is the first time the uk has blocked a takeover by a tech giant. kanye west, or ye to his friends, has agreed to buy the so—called "un—cancellable" social media platform, parler. his anti—semitic posts meant his twitter and instagram accounts were restricted. so far, little has been revealed about the deal. ye will say that he is a proponent of free speech and that he will be buying the website to promote that. parler has about a million users, reportedly. twitter has got 238 million. looking at it from a financial analyst's point of view, twitter does not charge for its services, it doesn't make any money, so it will be interesting to see what he thinks he can do with it and what benefit he could derive beyond, perhaps, his championing of what he would call free speech. chile's government has deployed its first a! listening smart buoy. 600 miles off the coast, the buoy monitors oxygen and temperature levels in

the ocean, as well as alerting ships about nearby whales. finally, fedex is saying goodbye to its robot delivery programme, roxo. fedex�*s chief transformation officer says it's no longer meeting customer needs, and this follows the news that amazon is also scaling down its own last—mile delivery robots. what are we all here for today? in 2018, the click team went undercover to investigate a scam. people were being offered huge profits if they invested in an apparently new cryptocurrency called 0necoin and then talked their friends and family into doing the same. the problem was, 0necoin didn't exist.

a few months later, journalist jamie bartlett started investigating a mysterious twist in this tale. 0necoin�*s wealthy and charismatic co—founder and figurehead dr ruja ignatova, regularly seen on stage at lavish events promoting 0necoin�*s supposed promise, had vanished — and jamie wanted to track her down. for eight weeks, jamie fronted one of the bbc�*s most successful podcasts as he reported on his hunt for the missing crypto queen in almost real—time. what a house. 0h, there's a security guard there. we are looking for the house of dr ruja ignatova? it's this one. 0k, do you know where she is? no idea. doesn't know where she is. he spoke to people ruja had known, saw the spoils of her wealth, and followed leads from listeners around the world to try and find someone who had

persuaded so many people to invest in a get—rich—quick scheme of astronomical proportions. it was the perfect scam at the perfect time. the hype of bitcoin, the lack of regulation, the price of bitcoin through the roof. the pitch was, "0necoin is bitcoin but better. "0necoin is bitcoin but cheaper. "and if you want to make, not 5% a year, not 10%, "1000% a year, you've probably missed that with bitcoin." jamie has been able to piece together most of the 0necoin story which he has turned into a book. but even now there are new developments, which means more episodes of the podcast as well. dr ruja ignatova has just been added to the fbi's top ten most wanted fugitives list, making her now one of the most wanted women in the world. is that thanks to you? laughs. be careful how you answer. i'm not sure, but the way i see that media works sometimes is that if you can

create a lot of excitement and interest in a story, suddenly the authorities decide they're going to act. i think what is interesting about her appearing on that list is she is the first ever crypto scammer, so alongside cartel bosses, alleged murderers, now we have a crypto scammer. how difficult do you think it is to disappear completely these days? i had always assumed almost impossible. except that... if you have got enough money then you can change your appearance somewhat, you can fairly easily obtain fake identity documents, and as long as you have iron discipline, you don't make a mistake, you stay undercover — or you are very well protected by governments that are happy to keep you there, i think you can disappear.

but not only do you need discipline, your close friends and family need to watch their digital footprints too. we were trying to find this hidden mansion we had heard rumours about in dubai, that we believed ruja had purchased — no—one knew where it was. we scoured through her brother's instagram and found he had taken a selfie six months after ruja had disappeared, which he had tagged as being in sofia, bulgaria. but the background looked like it was somewhere in the middle east. and there were a few buildings in the background, so you know, there were a few little clues, that we brought in a couple of open source intelligence specialists who are experts in being able to take a photograph and track down the precise location it was taken. so this one guy does a lot of reverse image searches for all the buildings in the background, and he has found the video of the exact buildings in the same order

as in the selfie. so he thinks, great, i can now tell you that it is in dubai. where in dubai? well now i will use google satellite to start trying to look down at where those buildings are, and try and work out a line of sight using sort of basic geometry really, to try and pinpoint down to the exact location. and he starts matching up trees, pylons, small buildings, walls he can see on google satellite, that match the background of the instagram selfie. all the way until he is able to identify little patches of stains on walls, and then finds the house using google satellite that matches the picture, and basically sends us an address and says, "this is where the photo "was taken, in the back garden of that property on that "street," and ijust couldn't believe it, from one instagram picture, that is how much specialist can find. and in the book you say,

you haven't posted much online yourself since? there is a reason for that, because i know the people involved in 0necoin don't like me very much. and i realised, even if i posted a picture of me in my back garden, there is a possibility someone could work out my home address, because i've done it to them. spencer talking to jamie bartlett there. meanwhile i have been me to meet a company hoping to create affordable hollywood—quality avatars with your mobile in minutes. shrinking the hollywood sized setup at budget might make a booth like this possible anywhere — whether it is to create a gaming avatar, in a makeup department for skin analysis, for influencers flogging stuff, or dare i say it, for the ever threatened metaverse. lumirithmic�*s setup here consists of a series of ipads, iphones and stands, so the cost

of creating this is the price of those items. you can also use android devices. once the images are all taken at the same time, they are stitched together to create a high—resolution picture. in a couple of seconds i am scanned down to a tenth of a millimetre�*s detail. an imperial college spinout, experience and tech are brought together to initially perfect stills from all angles recreating any lighting before moving on to producing video. i have been doing research on facial appearance capture for over 15 years in academia, first at the university of southern california, where i worked on hollywood scale scanning of actors�* faces for movies such as avatar. most scanning techniques only captures geometry and not the appearance. here because we focus on high quality appearance capture, the resolution comes from the reproduction of that appearance in a realistic

manner in a 3d rendering. here we have the 2d renders. this one looks like those images where you see the sun damage to your skin. here with controlled lighting conditions we are analysing your skin's reflections and breaking it into a constituent colour texture map, a shine map, a shape map, and which captures yourfine skin pores and and wrinkle detail... wrinkles, how dare you! i know. lauhs. you're a very brave man. and combining all of that with computer graphics rendering, i can now animate the light whichever way i like, and the skin will react. and in case you wondered, the weird rectangles in my eyes are the reflection of the ipads. 0nto the 3d images now, which thankfully feel a bit kinder than the previous overly analytical close—ups. and there's one striking feature.

the lighting is quite something. and to think that that's virtual, because that really looks like we are moving throughout times of the day. the ability to create believable shadows is where the realism comes from. even in an image that isn't itself animated, so getting this perfected should lead the way to better video versions down the line. although, what's happened to my ear? but the holy grail is being able to do all of that with one of these. and the company has cracked it — the pictures are lower resolution and they won't let me film the process, and i can show you the results. there's still a huge amount of detail here, my hair goes a little bit funny as we change the lighting, but what is the actual difference in resolution? this resolution is about 2k and then the full desktop set up you have seen has resolution of about ak, but the quality is still preserved and the fine skin detail and also the geometry.

the resolution is clearly good enough for most consumer applications. i don't think i'd want it to be any better. but... definitely further work required in terms of work to be done in terms of cutting out smooth silhouettes. and what is most challenging barrier is not the body or the face but the human hair. the hair silhouettes are very fuzzy and not discrete, and so this is where better algorithms will have to be created. even hollywood has the same issue, but it does have people for that. the scanning process usually does a pretty similar job that we are doing. it is the hair will then be modelled back to most of the hollywood rendering systems using artistic modelling processes for hair. so hair is its own research problem in some sense. so these avatars may not be perfect yet, but they do seem to be heading in the right direction. how long do you think

it will be before they've got a fully working virtual version of us too? how do you know they haven't already? uh...thanks for watching, we will see you soon. hello. it may be a little tricky to keep track of the weather this weekend. a lot of different things going on, things quite changeable, sunny skies one minute, the next some outbreaks of heavy and perhaps thundery rain. but throughout it is going to feel mild, even warm in any sunshine. low pressure remains the dominant force in our weather. this low has been with us for quite a few days now, weakening, but still bringing some rain

in the north of the uk. this next low, waiting in the wings down to the southwest. that will strengthen the winds later in the weekend. but the orange colours right across the chart showing that we will keep some very mild air in place. so through the rest of today, still quite a lot of cloud and some outbreaks of rain drifting northwards across northern ireland and scotland, brightening up across the eastern counties of northern ireland and southern parts of scotland, even into the central belt it should turn a little brighter through the afternoon. for england and wales some sunny spells but cloud rolling in from the southwest. that will bring some heavy and perhaps thundery downpours for south—west england and parts of wales later in the day. temperatures north to south, 1a to 18, maybe 19 degrees. 0vernight this zone of cloudy and damp weather continues to make progress northwards across scotland. we see further heavy downpours drifting northwards across many parts, some heavy and persistent rain into the south—west later. but in between, there will be some clear zones of weather. and with these clear skies in northeast scotland, it'll turn a little bit chilly. there could be some fog patches

to start tomorrow morning. tomorrow, though, a really wet start in the south. that rain will drive its way northwards through the day. sunnier skies returning behind, but with some heavy and perhaps thundery showers popping up. and the winds a little bit stronger tomorrow for some, particularly around some of these western and southern coasts. but those winds coming from the south, it's a warm wind direction. temperatures, again, typically in that range between 1a and 18, maybe 19 degrees. now through the week ahead, low pressure never far away, this low with us on monday driving further heavy showers. a very weak ridge of high pressure may bring something a little drier on tuesday, but there are more weather systems waiting out to the west. so there will be more rain at times through the week ahead. some of that will be heavy, but equally some spells of sunshine and feeling quite warm for the time of year. highs of 20 degrees.

good afternoon. rishi sunak has become the first leadership contender to secure the 100 nominations by tory mps — needed to enter the race to be the next prime minister.

the former chancellor has yet to announce whether he will launch