There is an ocean of viral videos from groping to wolf whistling, street harassment can be verbal or physical. Rush hour in this transport hub. Around 3. 5 million commuters every day swarm in, cramming into packed trains. A survey found 51 of women in london felt at risk of harassment on public transport. The global problem is so vast that it does seem insurmountable. But is it really unsolvable . Im here in Central London to host a hackathon. For those like me, not quite clued up on their urban dictionary definition, its where experts come together, form teams around a problem and collaboratively find unique solutions. Can bright minds actually solve harassment on public transport . Weve gathered a team of experts from very different fields to find Ground Breaking solutions, and tackle street harassment head on. Today they will brainstorm with an audience from around the world, then theyve gotjust one week to design, test and implement solutions. Lets meet the team. At the london transport museum, weve invited an audience to participate in this hackathon which will be broadcast live on bbc radio around the world. In the crowd, i meet our team of experts. Each bring a unique superpower to the table which, when combined, have the potential to make real, lasting change. Ellie is an engineer. She lectures in urban innovation in policy, working and making spaces saferfor women. Laura is the founder of advertising agency, mr president. You are all so eager, im just let it go on for a bit longer. Anne marie co founded an organisation inspires the next generation of girls in science, technology, engineering and maths. From a wish to control. Academic liz co chairs the end violence against Women Coalition in the uk. And last but by no means least, hannah, shes a retired london tube driver and now a power lifter. Shes competed in worlds strongest woman. Dont mess with her. We are here at the london transport museum. Shortly after the hack begins, problems with Current Solutions are laid bare. I only this year was sexually assaulted on the tube. I was going up an escalator and a man followed me, repeatedly touching me even though i tried to move away. I ended up having to give the same statement three times which, having to repeat that three times to three different people, is pretty harrowing. I cant talk about the specific case and am you shouldnt have had that experience. The whole setup of this is that the police are set up to take reports, to support victims, support women of experiences through the criminaljustice system if they choose to go that way. Many suggested technology as a solution. Actually, id like, theres a harasser on the tube button. It stops the train, everybody can know, everyone knows. As the discussion continued, one idea grew stronger. Perhaps the solution doesnt resolve around the victims or offenders but is about fellow passengers intervening when they see harassment . We met on a west london bus when i was assaulted on a bus and fred stepped in. And i, yeah. No one interferes, people tend to think its an issue on the side, lets let it slide. But one day if you let it slide, it may not directly affect you, it might affect your mother or your sister. Im afraid well have to leave it there because we have to end the programme. We could keep on talking forever but its a great start to the week. With what felt like a bombardment of ideas, the team has their work cut out for them this week. As the sun sets over london, i cant help thinking about the mammoth task ahead. This is bbc radio 4 and now its time for womans hour. Early morning commuters set off for the day ahead. This is the very week that the hashtag metoo went viral. It was a way for women to tag and share their experiences of harassment. This week, we are taking over the machine room in east londons maker mile, an area full of workshops and art studios. Before yesterday i was like, itll be fun. Try some stuff up, whatever but actually, after yesterday, this is a moment that we can. We can make a difference. I know you want to get started, so walk this way. And right on time. Your bus. We have hired this bus for the week. The team can use it how they wish to exhibit and test potential solutions. This is your space to play with it. Exactly. This is going to be right here for you. You can do what you like. Yeah, why not . Its going to be really interesting now we have the bus in real life here to take apart and put back together as we see fit. I wasjust feeling really overwhelmed, this is a big challenge. Now we have a big, massive toy. And im an engineer so a big machine to muck about with, its very exciting. So i want to play with the buttons, all of course in the name of research. Im excited to work with this group of women because i think there is an alchemy. We come from different industries, different ways of thinking. So i guess this morning will be, how are we going to stop harassment and at what point . Are we going to do something around that point of being harassed, are we going to look at how we change social norms before that happens . 0k. Assault alarm, what does that do . If youre being assaulted, you push it. Who does that send a message to . Everyone within earshot. Is that on every bus . Pretty much. Ideas flowing, the team head inside to discuss the solutions they want to work on this week. Building on yesterdays hack, a strong solution emerges. The concept resolve around the community of passengers travelling on buses and trains. How do we almost build some sort of social, immediate social structure so when you get on this bus you are immediately part of this team. And how do you nudge people to then take responsibility as part of that team . Because everyone is primed, notjust victims being primed, then we are all doing this together, its not just ask versus them its all us together. We need people to stand up and say yes, its awful. This happened to me. But im not alone. I will not be alone. The team will collaborate on the central concept of finding ways to change the communitys behaviour so that they act together against harassment. Laura is working on messaging and design. Anne marie will work up a technological solution for women to signal distress using a badge. Professor liz will work on how those passengers can then safely and effectively step in to deal with the harasser. Train driver hannah will focus on the inside of the bus. But ellie the engineer leaves the discussion still unsure of her solution. Time is ticking. At the end of the week, we will reveal the teams solution on the bus to an audience in Central Londons busy Covent Garden. An audience will put it to the test. Will the results of their hard work really start to solve harassment on a global scale . To achieve all they want to this week, they cant do it alone. They need help from passionate volunteers. So hannah collaborates with an artist lela Eleanor Smith who has travelled down from scotland to help out. 0bviously with the week, it is constrained as well. We cant achievably in a week redesign and we can to get a whole bus and tear it apart and do that. I think it would be really good to do a visual kind of projection of what is happening. As the team pack up for the night, there is still so much work to be done. Despite starting the day full of ideas, no tangible progress has been made. In order for the printers to get the design stand for the bus, the team must send off work today. But they havent even started the design. Without a concrete design for the bus, laura is quick to call the Printing Team to try and extend the deadline. They think the problem we have is we really only start work yesterday morning. Im hoping that. We will stuff quickly as we can but it will only be end of today rather than lunchtime unfortunately. End of today, i dont think we can do it. For friday . Weve got to get you printed remember . Yeah. I dont want to be awkward, ijust dont want to get you down. I totally. I totally understand. We would go as fast as we can as well, we are under quite a lot of pressure the side. 0k. Dont delay. Thanks laura, bye. Yeah, lets start. Meanwhile, anne marie has got a deadline of her own. In order to get the badges made, she isjoined by arundhati and nadine, electrical engineers that have just 2a hours to produce prototype badges. But the concept isnt exactly crystal clear. So the brief is that its the person, were helping the person that is attacked. Then then your badge. As a victim can make you wouldnt necessarily have a badge. You have the activator but not badge. They would yell . Does that make sense . If they could make a scene, they would make the scene. Anne marie possibly Ground Breaking idea revolves around connecting the community of passengers. When the victim presses a panic button, orapp, passengers badges will light up, alerting them to the problem. With the concept as clear as mud, anne marie drops another bombshell. Surprise. In theory, your deadline would be tomorrow. Lauras Advertising Team have had a light bulb moment. The idea comes from miranda, a junior creative as lauras agency. You have the commute that is such a problem on the train anyway. We watched the video this morning about a month shouting at this woman, everyone was silent. The commute is quite good actually. Unmute the commute . Thats quite cool actually. Unmute the commute is a concept that not only encourages victims to speak out but also asks fellow passengers to step in. Artist leilas installation involves so many elements that she is collaborating with makers anna and susannah to help get it done. The concept involves foam, a lot of foam. So the plan we have at the moment is to cut some hand shapes out to go into this stairwell so you have to wage your way through these foam hands to get to the art installation. Its representative of the kind of invasion of interpersonal space. A key part of the teams message of unmute the commute is the idea of the passengers pledge. That they will step in when they see harassment. So professor liz has asked katie from activist group hollaback to hold one of their workshops which teach people about safe ways to intervene. They hope these workshops which they teach around the world will encourage people from being just passive bystanders into actively intervening. Actually talking to a tfl member of staff is a good idea or even british transport police. A lot of us arent that comfortable engaging with the police. Particularly people of colour, particularly lgbtq people, migrants, anyone with an insecure status who could be a victim of one of these kinds of crimes. Thats kind of why this Bystander Intervention stuff is so important, because we need to rely on each other. As the day nears a close, ellie the engineer finally finds her stride. Following an from her slogan that lauras team came up with, unmute the commute, ellie wants to create a soundscape of victims story. She has recruited her theatre create a friend imogen butler cole, to help. The idea of unmuting is really nice because its about activation and making noise, its about being heard. Hi there, hows it going . I think its getting there. What we want to do on friday is have to hear the soundscape on the bus. So wed need speakers around the bus. And then we would just play it. And let people in that space hear what has happened to other people in that space and then sort of end with an invitation to do something. That is where we are. 0k, it sounds really good. Sounds like lot though. Its wednesday. Theyve got to get this pretty much finished by tomorrow, can we manage that . Um, yes. Im incredibly confident. Well, im convinced. Come and see. Around the corner in the workshop, anna and susanna are busy cutting hands. The foam variety, luckily. I think they are really nice. How theyjust stand up like that. The first attempt did not go so well. No template meant disastrous looking hands. Now there is a wooden template, things are going a lot more smoothly. We just need 50 more to do or something . Seriously . But with the bus looking decidedly untransformed, all the work must happen tomorrow if it is going to be ready for the big reveal on friday. Its crunch time. Our final day of prep and the workshop is a hive of activity. Hundreds of unmute the commute badges are being laser cut. This is ourfirst badge. Oh my goodness. Oh look, no way and right on time, the Printing Team arrives with the vinyls. Hi, laura. Nice to meet you. Hi, nancy. Amazing. About three or four hours. Thank you. Tony gets stuck in, across london, i meet ellie at the bbc where she is recording and mixing the soundscape project today. This is an incredibly personal project for her. She recalled a day six years ago that she has never forgotten. It was about 8am, it was so busy and id seen this man help what i thought was his girlfriend on to the tube, kind of touching her quite intimately on the lower back. I felt him pressed up against me. I felt him getting aroused. So ellie responded in the way she felt most natural. She danced on the tube. There is no way i was going to stand up and do a big speech about it. But i decided to dance it. That was just what made sense to me. The video went viral. I obviously knew people would see it and people would have an opinion about it. But that wasnt really ever the point, it was about an expression of myself. 0k, go for it. Ellie invites collaborators to record the stories of real accounts that the Campaign Group holla back created. Real testimonies from victims and bystanders from around the world are read out. As i stood up, one of the two standing guys grabbed and squeezed my crotch through my skirt. Im not sure why but i almost froze on the spot and i didnt say anything. The rush hour crowd, two were standing over me. Im totally unaware that this stuff might be going on. Then ellie decides she wants to step up and record her own story. It made me feel on edge and over time i got increasingly angry, this is not my issue, this should not be womens issue, we should be able to move around and go to work, go to school in freedom. This is our body, our space, and we should have the right to live in it. Across town at the base, leila is racing to get the art installation finished on the inside of the bus. At the same time, tony is working away on the outside the bus. Meanwhile, the electronics to the unmute the commute badges must be soldered on quickly. Today, anne maries organisation is holding a Business Confidence event for hundreds of teenage girls in london. It is the Perfect Place to test the buttons. So we asked a few of the students what they thought. The idea is that you will be notified that something is happening around you and somebody is in need of help. I think the idea is really good. Doing it in a discrete way allows the person to have time to think about how they will help you rather than act on impulse which may cause something drastic to happen. Its a great idea but it should have Something Like a gps location. When women are harassed, usually the first reaction is what were you wearing . Probably brought it on yourself. This allows women to help other women in a really discreet way. The badge was later presented to tfl who said they will consider implementing it. Perhaps this is the start of a real solution. Time will tell. But time is something the rest of the team dont have. Night draws in and they are forced to pack up. With thousands of tourists flooding through Covent Garden tomorrow, what will the verdict be on the bus . 5am, lynne, our bus driver arrives, bright and early. The crowd arrive. Time to reveal all. Ta da, look what youve done isnt that incredible . It should be on every bus. So excited. Im so thrilled that its done. And we have fantastic ideas, the concept, the buttons, i cant wait to see at the top of the bus. Everyones working towards a common goal and injust a week you can come up with something. So much money, so much brainstorming. You get passionate people together, after a week. Why dont we head into the bus and get a better look . Oh, wow. As people crowd inside the bus, they have to worm their way through the art installation of hands. Up to the top deck where more hang down in their way. 0n headphones, passengers listen to the testimonies that ellie recorded yesterday. Everywhere you go, you are reminded of what it feels like to be harassed. Focusing on others and the bystander in this case might be a way for us to tackle an old problem in a new way. As part of ellies testimony project, she has choreographed the words to a new dance. He just kept his head down and got off at the next station. Then i sat down and tried to stop myself from shaking. I even felt embarrassed i stood up to this man. Its actually a very powerful experience, these hand shapes as you go up the stairs and then they are hanging down. But what was most powerful was hearing the accounts of women and then ellie doing her dance performance upstairs on the bus. The two together were really profoundly moving. Its absolutely fantastic what has been done in one week. I think im running on fumes by now as far as the mental side goes but im absolutely so positive and i feel that have really made a start. There is a huge way to go on this. There seems to be anyway a wave of awareness that is coming. That is here. Will you pledge to take action . Make a pledge to unmute the commute. The sun sets over london. It is time to take stock. When we started out, i was thinking the problem is global, its far too huge, what are we realistically going to get done in five days . But these women ive met this week are inspirational. Past solutions have either been about the victim or the perpetrator but theyve made this about the community. It doesnt matter where you go in the world, you will find community and if this week has taught me anything at all, it is that by working together, globally, we can solve any problem. Its been a lovely day for most. Quiet story. Lots of sunshine. If you wintry showers across northern scotla nd you wintry showers across northern scotland and north west england. For most of us, skies like this. Its been very cold. Temperatures falling away again this evening. Suddenly overnight. Freezing fog forming. Temperature starting to rise across the south west into Northern Ireland as the weather system moves in bringing strengthening winds and outbreaks of rain which will turn into snow. Initially Northern Ireland, then wales, Northern England and southern scotland. Temperatures around 5 degrees in plymouth by the end of the night but very cold further north and east as the rain continues to push. Snow white bread and heavy across the midlands, Northern England and southern scotland. The met office hasissued southern scotland. The met office has issued an amber be prepared warning for a small area of the south pennines. Around the Peak District we could see up to 15 centimetres of snow. Settling is no widely, even lower levels across scotland, Northern England, into parts of the midlands. South of here, largely rain. The rain will be falling on frozen services, ice is a widespread risk. By lunchtime skies brightened up nicely. Further wintry showers across scotland, far north of england and pennines. To the south very windy, gales in places. Bright, sunshine and milder. 8 iid here, still quite chilly further north. The area of low pressure clears, taking strong winds with it. Another system bringing through wet weather. Saturday, against sunshine and showers. Gales across southern areas, very mild here, 10 13d. Further north less cold but winding is over the high grounds of scotland. Further south, a gentle staying dry with sunshine. For midnight, new year, centraland eastern areas have a better chance of staying dry with clear spells, chilly wind, this will be pushing showers into many western areas. This is bbc news. Im reeta chakrabarti. The headlines at 5 00 ice and sub zero temperatures cause treacherous driving conditions, as the coldest night of the year is predicted, with further snow to follow. Hundreds spend the night at Stansted Airport after flights were cancelled or delayed. 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