as we go live in virtual reality. we are about to put a whole new spin on the world of mobiles. we are at the mobile world congress in barcelona — the big show devoted to phones, tablets and all things mobile. we're a bit behind schedule but we're going to get there. although, if we look a bit distracted it is because we are preparing for a rather audacious experiment. it is not that we are not interested in the floating displays, connected bus stops, flash cars, smart shoes or robot drones, it is just that we are about to bash out something a lot more complicated. last year we filmed an entire programme in 360 degrees, allowing those watching in virtual reality to look around the fantastic locations simply by turning their heads or their phones in whichever direction they pleased. and that is the power of 360, you really feel like you have been teleported into the situation. not only that but these days we also have the ability to stream 360 live, so imagine that, the next time we send a robot to the moon, if it has a 360 camera on board, then we can all put on a pair of goggles and actually feel like we are there too. so that is what we are doing today, getting ready to go live in 360, not to the moon admittedly, but to a place that is still a pretty strange landscape. here we are at the massive mobile world congress. 8 enormous halls of madness and noise as everyone tries to launch their product with maximum pizzazz and maximum volume. these days this event is notjust about mobiles, of course — virtual reality is everywhere. since you can use a phone as a vr head—set, many companies have opted to up the excitement by strapping people in and hurling them about. yes, folks, vr can be totally immersive if you have your own 360 chair. i don't even want to think what kind of experience this chap is having. but going live in 360 is less about the head—set and more about the kind of camera equipment you can and cannot use. you are currently watching me through a nokia ozo which is a professional 360 camera with a professional prize tag to boot — about 16,000 us dollars but it is a beautiful looking thing. it has 8 lenses all around the sphere which means not only can you can see in all directions but it can also shoot in 3—d because that combination of lenses allows it to process the stereoscopic view. what is really weird is it has this enormous battery pack at the back, which you think would be in shot but actually this thing has a blind spot to about here. what they so is just get that almost 360 view and stretch it around. modern 360 cameras will stitch the scene together themselves in real time, automatically wrapping that weird warped video into a sphere around your head and that is what enables them to go live. if you wanted to stream the full 360 view from the ozo, you are going to need some extract kit. two dedicated hardware boxes and an internet upload speed of at least 30 megabits per second. in a trade show like this, we are not that lucky. i think we have to accept that it is early days. to get really high—quality, ideally stereoscopic video, so you really can look around and feel a sense of depth, and feel that you are there, is going to take a while. there are bandwidth problems and just having equipment that can transmit and that amount of data so that when you look, the picture gets rendered according to exactly where you are looking. it will take a while to get it sorted but we are starting there. we are going to be doing two lives in 360, testing two different cameras and this is no mean feat because as with last year's 360 show, we are coming to this before the manufacturers have made bespoke equipment. to get good pictures, good sound and a decent bit of interaction with the audience, we are having to hack together various bits of kit and hope no one trips over any of it. my microphone goes into a transmitter, which goes into a receiver, which goes into a box, which plugs into another box and then we've got like a half a mile of ethernet cable which is going to a network access point which is hidden in the garden. the first 360 camera we are using is the 0rah [ii — four lenses which between them can shoot the 360 video in ultra—high—def 4k. it is important to note that this is the resolution of the entire 360 shot. the viewer only sees a part of this as they look around the scene. at the moment, it is not showing us anything we have. we are a bit blurry in london. it was our very first attempt so things were bumpy on the run—up and rather rough around the edges. we were supposed to go like —15 minutes ago. we're going live now. ahh. that said, it seemed to hang together and viewers on our youtube 360 channel got to find out a bit more about a car that's planning to go at 1,000 miles per hour. three engines? yes, it has a gas turbine engine from the typhoon eurofighter and two jets, effectively. rockets? rockets, effectively. and you need three of them. yes. to get to 1000 miles an hour. the gas turbine is for your below 800mph manoeuvres and then the rockets fire you up, give you the kick to over a thousand. streaming such a high—quality picture takes a lot of data hence we had to use a fat wired internet connection of about 10 megabits per second but for our second attempt, we went commando. the ricoh theta s is the camera we used to shoot the 360 helicopter scene from last year. it is a small hand—held stick with two fish—eye lenses. it's full view is only two k, same as a normal high—definition picture so the part you see in virtual reality is much lower resolution but that does means it is possible to stream the video live over the mobile network which is what we did, in style, with a drone. to give them a taste of what it is like to be so close to a drone, you might lose a limb. weird. very soon, ricoh is releasing the theta r which has a few upgrades, including more connectors, expandable storage and it will do the stitching in the camera itself rather than needing a computer to do all the grunt work. for now, we were pretty happy with our little experiment and very soon there will certainly be more fully integrated kits to let us go live in 360 with much less bother. when we went to up a glacier and to the large hadron collider to film those in 360, we use six gopro strapped together to film the entire seam. we then had to stitch that footage together manually, using a powerful computer and software, and many, many hours. since then, gopro has released the 0mni which is a case in which six gopros fit. it has one remote start for all six cameras, which is good and it also comes with a box that does all the stitching. in a couple of months‘ time, gopro says it will release an update which allows you to do that live. and if you want to create your own 360 videas, this tiny camera by lifi plugs into your android phone. the videos are not live but the stitching is quick and you can share it easily on your social network. anyway, enough 360! let's see some phones. now, a couple of years ago we got to play with a sony camera which could shoot video in super slow motion and we discovered that everything looks cool when it is filmed a0 times slower... well, almost everything. so it is not real surprise that that technology has now been shrunk down and down and had made its way into a phone. this is the new sony xperia x2 premium and it can film at 960 frames her second. which is great news for glitter borders everywhere. to do this, sony has had to embed some super fast storage in the image processor sensor itself. the problem is, because there is only so much space, you are limited to an extremely short burst of slow—mo every few seconds within your video. it is alright when you want to catch something in super slow motion that is going on for a long time, like this. but when you want to catch something that only happens once at a split second, it is quite nerve racking. case in point, setting fire orange zest, which i did not even know was a thing. 0k. 3, 2, 1, go. i was too premature that time. and that is a problem. the bursts of super slow—mo is only 0.182 second — that's less than a fifth of a second. so you have to be spot on with yourtiming. me, for the most part, i was a bit too trigger happy but when you do get it — flaming oranges! it is worth bearing in mind that sony actually makes the camera parts for many other brands of mobile phones so if this super slow—mo catches on, we could well see it in other phones before too long. what else is hot at this year's mwc? here's stephen beckett with a round—up stephen. incredibly, at a convention with some of the world's biggest phone manufacturers hawking their newest and shiniest devices, this is the phone that everyone‘s talking about. finnish start—up hmd global has resurrected a scintillating piece of nostalgia with a reboot of its nokia 3310. do you remember that? hmd licensed nokia phone brand at the end of 2016. close to indestructible handset, with a seemingly infinite battery life, it now been given a new lease of life with modern curves, jazzy colours and, of course, a re—versioning of snake. blackberry has also gone back to basics with a new flagship phone — the key0ne. it has a physical gesture sensitive keyboard that hides a fingerprint scanner under the space bar. that is not the only slice of nostalgia here, samsung is getting in on the action too with this classic norris pencil although i would not sharpen this particular one because there is quite a lot of digital stuff in the end to allow you to do things like this. google would much rather you talk to your devices though, rather than write to them. it has announced its personal assistant, google home, will finally be available for sale outside of the us and by may in the uk. and in another new attempt to dominate the ai market, the company also said it will roll out its voice—activated digital assistant to all android phones running marshmallow and nougat. until now it has only been available on goggle‘s own pixel line of phones. that is apart from huawai and lenovo mobiles — those are set to use amazon's alexa instead. lenovo‘s upcoming moto z will get its assistance smarts through a snap—on back, which they're calling a moto mod. 0thers though are ditching customisation. lg launched its new flagship g6 phone without the modular capability of its previous models. the company says customers do not fancy forking out for extra parts. the lg g6 also knocks the traditional aspect ratio oyt of the park — the screen is 18x9 — twice as tall as wide. smartphones have traditionally been 16x9. and it would not be much of an mwc round—up without at least one mention of the words "5g". even though no official 5g standard even exists yet, it hasn't stopped everyone here from slapping the term all over their stands. nowhere more so than here, with zetee‘s bold claim of creating the world's first gigabit phone. you can see the numbers ticking away here and they mean this is sucking up data aroung 50 times faster than the sort of speed you might get on your ad phone in yuor pocket. we are not actually allowed to touch or use these phones though and that could have something to do with all the cables out the back. i'm not sure if they are part of the phone or part of the demo. it could be some time yet before you get your hands on these sorts of speeds. over the past few years, the air that we breathe in our cities has become a big issue. air pollution is an invisible killer and it is something that many people from politicians to tech companies feel needs urgent attention, but what to do? all next week, the bbc is going to be looking at the issue and possible solutions in the so i can breathe season. we'll be looking at some of the gadgets that might help us to track the pollution around us so we can choose what to do with that data. it only took five days this year for london to reach its yearly air pollution allowance. people were warned to reduce outdoor physical exercise as levels soared beyond those in beijing. a place where scenes like this aren't unusual. and with limits being exceeded in germany, france, italy, spain, as well as other cities across the uk, never before have we been so aware of the air we breathe. yet, if there are better or worse days or better routes that you could take, then could using a personal air quality tracker help you make better decisions about what to do, when? first of all, it depends how accurate they are and that's something i'm on a mission to find out about. the makers of some of these devices say they have gone through extensive testing over a long period. while our spot checks today are just a snapshot, i am curious to find out how they measure up. to carry out our first experiment, i've come to this central london mews and i have enlisted the help of the university of birmingham who for fairness of the experiment have brought along this which is going to take some pretty serious recordings of air quality along with my four devices here to see how they do. the atmo tube can be attached to a bag to track volatile organic compounds known as vocs, as well as carbon monoxide. the cleanspace tag was released last year and tracks carbon monoxide. it connects to the company's app making a personal and crowd sourced element to the official data it already displays. the i—blades spartphone case, amidst its other functions has an air quality sensor tracking vocs. and this working prototype flow by plume will work alongside already popular plume air report app. it tracks nitrogen oxide and vocs eventually looking to add particulate matter and ozone two. they are also suitable for indoor monitoring. i have given them five minutes to do their thing but at the moment it is a bit of a sea of numbers. but luckily i have found a man who knows what all of this means. i am joined by professor roy harrison from the university of birmingham. what is going on here? we are getting different readings on all of them but they should all be giving us the same impression of the pollution. and this is where the fun begins. let's look at our first device. this is the atmo tube. it is giving us a level of 0.22 ppm which, it's telling us, is good at quality. 93 out of 100, so telling us things are pretty clean. in this environment, that would be a pollutant coming mostly from traffic. indoors, there are other sources but now we are outdoors. comparing that to your readings, are they on track? i would say our reading is different pollutant but telling us it's rather more polluted than this 93 out of 100. i wouldn't call the air quality good, i would call it average. we have the cleanspace device next with their tag. this one is reading carbon monoxide. it is giving us concentrations that appeared to be a little bit above 1.5 parts per million. that would be consistent with what we are seeing in the nitrogen dioxide. a moderate level of traffic pollution, as we might expect. that in a sense is a more predictable sense than the ones depending on the volatile organic compounds because that is a big range of substances and the sensitivity will not be the same for every compound. then we are looking at the i—blades phone case. i noticed that this one sets a baseline for wherever you open the app so the fact that we opened it here on this street, it's calling this street zero which is a funny way to work. i think it is, yes. ideally it needs to be zeroed in a very clean atmosphere but if you don't have an independent monitor, how do you know where the clean atmosphere is? i do have a bit of difficulty with this one. 0urfinal device is flow by plume. this is the prototype, the final version will look similar. it syncs up to an app that doesn't actually give numbers. what do you make of that for a start? i understand the sensor is responding to nitrogen dioxide and voc, volatile organic compounds, so we might expect it to be correlating with our device in the car. this is telling us that the pollution level is high. i understand that that is a judgement against health—based standards from the world health organization. i do find a little surprising because i wouldn't regard the levels here as high and certainly not as a particular health risk, for example. for the second part of our experiment, we have come to a somewhat busier street. it's baker street, the home of sherlock holmes where our investigation shall continue, professor. i can see the readings have been changing. what do you make things? well, it's a busy street. 0ur reference analyser in the car is showing concentrations about double of those we were reading in the news or even three times higher at times. the atmo tube registers a rise in pollution but still calls the air quality good. the cleanspace tag reacted appropriately, the i—blades case rose from zero and flow by plume still simply says high. there is an argument from some that by tracking this data and taking control ourselves, we're diminishing the government's responsibility to actually improve the situation, but what does our scientist walk away from our day's activity thinking? they are very variable in their performance. one could try and use them to judge which routes were the best ones if one was walking to work, for example, but that would not be a simple matter because the pollution levels change from day to day based on the weather so you'd need to do the different routes many times in order to get a representative measure of what the actual pollution levels were but i suspect your answer would be no better thanjust looking at the traffic and say, "wow, this is a quiet road, why don't i use this one?" it seems to find my perfect running route, i need to either run a lot with the devices or keep my eyes open without. that was lara and a big source of air pollution in the developing world is that produced by the burning of kerosene. it is also dangerous and can cause house fires. obviously it would be preferable to move to solar power but a rig like this costs $200. something many families cannot make as a single lump sum. this company is suggesting renting a solar system like this with a panel and all this kit to families in return for micro—payments of about 50 cents a day which they can make over the mobile network. 0nce they've paid for the price of the equipment, they get to keep it. if they stop making payments at any point, this box can be contacted over the mobile network and be switched off remotely. a similar scheme is being piloted with gas in tanzania to try to move people away from cooking with charcoal. again, the barriers to entry mean buying an entire gas cannister is too expensive. but this smart metre system allows micro—payments over mobile which allow small amounts of gas to be released for each. you could of course remove the metre, you might think, but if you do it sends an alert to the scheme‘s administrators. here is something else that has impressed us at mwc. hence, the impressed look on all of our faces in this picture. this is a zte phone that was released a couple of months ago that lets you to take 3d photos with the stereo lenses on the back. then you can view the photos in 3d without glasses on the screen because it has a lenticular display. which means your left eye only get left information and the right eye only gets right eye information. if you hold it right at the sweet spots, you get a 3d picture. if you hold it outside the sweet spot, everything goes crazy, i wouldn't recommend that. that is it for click in the mobile world congress in barcelona. i hope you've enjoyed it. feel free to let us know what you thought of our 360 lives on twitter @bbcclick. be kind but be honest as well. thanks for watching. see you soon. good morning. saturday was a day of mixed fortunes. sunny for some, wet for others. let's have a look at some of the weather watcher pictures that we have to illustrate the point. a pretty miserable day across parts of aberdeenshire. the rain relentless all day. further south, some lovely spring sunshine and warmth to go with it. highs of 13 degrees close to london. yes, it was beautiful here, but the rain continued with over an inch across parts of northern scotland and plenty of showers piling in around the low. as we go through sunday, the rain will clear into the northern isles and that will allow this weather front to push into the south—west. so, a change. looking at 9am in the morning, some sunny spells. a few showers across much of scotland, but on the whole an improving weather story. not bad into northern ireland and northern england as well. sunshine from the word go. we might see rain pushing into the southern fringes of the isle of man and across the north—west of england and wales, down through the midlands and into the south—east corner. a wet and windy start to sunday morning. even once the rain clears away there will be plenty of frequent showers towards the south—west and this will start to drift further inland, driven in by strong to gale force gusts of wind that are likely to develop through the day. gusts in excess of 60 mph for a time, so a pretty miserable afternoon for some of us if you get caught in the showers. for northern england, scotland and northern ireland, we keep the sunshine and it'll be quite pleasant. a day of changed fortunes. 7—10 is the overall high. for the premiership matches, if you are lucky enough to have tickets and you are keeping a close eye on the forecast, a few showers for the tottenham match into the afternoon, but the rain will have cleared. sunderland v man city should be dry, albeit clouding over a touch. into monday there's another low that is likely to threaten into the south—west for a brief spell, but it could be quite tricky, with some very strong to gale force gusts of wind and some heavy rain across parts of south—west england early on monday morning. we we'll need to keep an eye on that. it drifts into the near continent, so shouldn't cause too much of an issue for too long. behind, sunny spells and scattered showers for monday. as we move into tuesday, another weather front looks likely to push in from the west. so things stay pretty unsettled. tuesday will see more wet and windy weather moving in from the west. by wednesday, a quieter spell and a little bit milder. until then, take care. welcome to bbc news, broadcasting at home and around the globe. i'm gavin grey. our top stories: we're live in beijing as china's annual national people's congress gets under way. the communist party leadership is announcing the main priorities for the coming year. hello. more than 3,000 chinese lawmakers are meeting for the annual national people's congress. it's got under way in the last hour in the capital beijing. the meeting is taking place in the great hall of the people and will last for ten days. the congress is the body which debates and approves government policy.