And prince harry and meghan are in nigeria as part of the dukes promotion of the invictus games. You are watching bbc news. More on those solar storms with an expert explaining how that happens, the link between the sun and those storms, in the next 15 minutes or so. Lets talk about ukraine for now. More now on Russian Forces launching a surprise new Ground Offensive in ukraine crossing the border into the northeastern Kharkiv Region. For months fighting has been focussed in the east where russia occupies large areas. Fridays attack may be an attempt to open a new front and intensify pressure on kharkiv, which is the countrys second largest city. Small groups of Russian Troops with armoured vehicles pushed through the front line military sources say they advanced a kilometre, before being pushed back amid reports of sustained russian shelling. Earlier i spoke to maria avdeeva, a security analyst from ukraine. I asked her to explain, what is happening in kharkiv city and in the region the situation is different for the city itself and the cities and areas around the border. Because the constant shelling from the russian side is going on for more than a day now, russia has moved into ukrainian territory and captured several villages. But these villages are just on the border between russia and ukraine, so in a way for almost two years they were a grey zone with few People Living in the area. But now because of the constant threat and intensified attacks, there is evacuation from this area, so these are mostly elderly people who Ukraine Evacuates to the city of kharkiv. The situation in kharkiv remains more or less calm, yesterday there was the longest Air Raid Alert for the whole period of the war, for more than 12 hours, but the situation is calm, there is no panic. It didnt catch people by surprise, this russian attack, there were numerous reports that russia was amassing troops, so this was known that they will attack, distilling catch people in shock like in the beginning of the invasion because people who returned back from having evacuated, they know what to prepare for. Is there a concern about what happens next . Ukraine has prepared for this attack. There are numerous lines of defence and president zelensky has inspected them himself a month ago. There is no chance that russia can go further, closer to the city but they will try. We know that the amount of troops on the russian side around 50,000, this is a big group of troops and there is a question where the main attack will happen. What is happening now looks more like a probing and testing the defence lines here and there, in multiple directions, but there will be another move and for that move ukraine is preparing because all the troops already in the Kharkiv Region are also deployed more and more troops are concentrated around the city. Here in the uk, a Police Officer has been shot in the leg with a crossbow in buckinghamshire. After responding to a reported stabbing in high wycombe last night. 0ur reporter frances read has the latest from the scene the Police Officer was apparently responding to reports of a stabbing in this area when he was then shot in the leg with a crossbow. Armed police then shot a 54 year old man who was arrested on suspicion of attempted murder. He was taken to hospital with his injuries and is under police guard. As you can see, behind me, there is still a big Police Presence at the moment, there is a cordion in place as well. But we spoke to terrified neighbours, including neilwho run indoors with his two year old son. I wasjust playing in the park with my son and my partner, i saw someone hiding in a bush. I could see they were wearing a tactical helmet. I knew something was about to go down, but in the park it was silent and normal. I grabbed my son and told them to get home and in a few minutes it was all kicking off and it was pandemonium everywhere. And then a couple of minutes later, there was gunshots and the suspect was shot in the park where we with their families were playing moments earlier. Police say they are not looking for anyone else in connection with the incident. The force has made a mandatory referral for itself to the independent office for police conduct. That is normal under circumstances where a firearm is discharged, so they will take a look at that case. Prince harry and meghan are in nigeria this weekend as part of the dukes promotion of the invictus games. On friday they launched their tour in the Capital Abuja with a visit to the Lightway Academy college which receives support from their foundation to educate young girls affected by conflict. Later today they will meet Wounded Soldiers who are representing the country at next years event in canada. 0ur africa Correspondent Simijolaoso has more. They have been getting a really warm welcome here in abuja. Prince harry went to the ministry of Defence Headquarters where he received a Military Salute and they are the department behind their visit. And as you mentioned, they went to a school here in abuja where they were greeted by a group of really excited and enthusiastic schoolchildren there. They spoke about Mental Health and prince harry told the students to promise to be open about their Mental Health and not to lock in their emotions and also to kind of kick the stigma around Mental Health into the long grass, he said. He also told them that he wants them to remember that its ok to not be ok. After their visit, i spoke to a couple of the students. One girl told me that she was left really inspired by their message, especially having such a high calibre couple come to visit their school and that she herself had suffered or struggled with anxiety and depression. And now she feels the courage to be able to speak out about her Mental Health. Lets return now to the spectacular Northern Lights which could be seen as far as kent and plymouth last night as earth was battered by the biggest solar storm in more than 20 years. Lets speak now to mathew 0wens. Hes a professor of Space Physics at the university of reading. Thank you for talking to us. Take us through the science of all this, why do the Northern Lights happen and what is the link with the sun . Thank ou for what is the link with the sun . Thank you for having what is the link with the sun . Thank you for having me what is the link with the sun . Thank you for having me on. What is the link with the sun . Thank you for having me on. The what is the link with the sun . T� iaia; you for having me on. The Northern Lights are very similar to how a neon light works, you put an Electric Current through a gas and it emits light. The reason we have these electrical currents in the atmosphere is because the earths Magnetic Field is being battered by these eruptions from the sun and they left about three days ago. We knew they were coming and focused on quite well. Knew they were coming and focused on uuite well. ,. , quite well. There were some quite wor in quite well. There were some quite worrying warnings quite well. There were some quite worrying warnings about quite well. There were some quite worrying warnings about what quite well. There were some quite i worrying warnings about what effect this solar storm could have on satellites and power circuits, has any of that come to pass . Having the advance warning any of that come to pass . Having the advance Warning Forecast any of that come to pass . Having the advance Warning Forecast helps, advance Warning Forecast helps, certain amount of preparation can be done. We are not really going to know the full. Nothing disastrous has happened as far as we know. 0ver has happened as far as we know. Over the next few weeks we will dig into what the effects were critically on the power grid. Irate what the effects were critically on the power grid what the effects were critically on the power grid. We are ust looking at the pictures. H the power grid. We are just looking at the pictures, absolutely at the pictures, absolutely stunning. We were surprised by how extensive the Northern Lights were in terms of how far south people could see them . In terms of how far south people could see them . Definitely, i was tellin could see them . Definitely, i was telling people could see them . Definitely, i was telling people to could see them . Definitely, i was telling people to go could see them . Definitely, i was telling people to go out could see them . Definitely, i was telling people to go out and could see them . Definitely, i was telling people to go out and look| telling people to go out and look north thinking they were going to squint at a green haze and then you went out and there was this amazing light show. Everywhere you looked in the sky, it was just everywhere. Glues which are quite rare, that requires stimulating nitrogen in the atmosphere. Really impressive. Im atmosphere. Really impressive. Im interested by the nitrogen, why are there so many colours and how unusual the display was . The different colours unusual the display was . Tue different colours come unusual the display was . Tte different colours come from different colours come from different parts of the atmosphere. You normally get the greens and the reds from oxygen, just occasionally you can see the pinks and blues from nitrogen which requires a bit more energy to stimulate the emission. It wasjust such an energy to stimulate the emission. It was just such an intense storm that we got that. For wasjust such an intense storm that we got that wasjust such an intense storm that we got that. For people like me who were in bed we got that. For people like me who were in bed and we got that. For people like me who were in bed and managed we got that. For people like me who were in bed and managed to we got that. For people like me who l were in bed and managed to miss the whole thing, will we get another opportunity may be tonight to step outside and see them . The pictures we have had coming in from All Over The Uk are absolutely stunning. There are a few more of these solar eruptions en route, they have been so many of them in the last few days, space was just a mess yesterday. There are a few more ebbing through, they should arrive tonight, but i dont expect it to be anything as impressive as last night unfortunately. T anything as impressive as last night unfortunately unfortunately. I will live with that, not unfortunately. I will live with that, not quite unfortunately. I will live with that, not quite as unfortunately. I will live with that, not quite as good unfortunately. I will live with that, not quite as good as i unfortunately. I will live with i that, not quite as good as last night but still hopefully be able to see them. Good to speak to you, thank you. This week, the uks media regulator, 0fcom, set out new rules for social Media Companies aimed at protecting children from harmful content online. 0ver a0 measures have been set out including making firms change their algorithms and perform more rigorous age checks. Around the world, governments are considering or have already passed similar legislation. Analysis editor ros atkins looks at what other countries are doing to try and protect children online. In many countries were seeing a new approach to protecting children online. Governments are saying this is no longer a mystery to us. Governments are now saying, 0k, we feel like we know what the levers of control are and were willing to pull them. In the uk, new rules are being proposed. At the moment, teenagers, younger children up and down the country can experience harmful content on their social media feeds again and again. And this has become normalised, and that has to change. To do that, over a0 steps for tech firms have been set out, including robust age checks and changing their algorithms so harmful content isnt recommended to children. These proposed rules follow the uks 0nline safety act, which was passed last year. The us is in a different position, one industry commentator notes, were in 2024 and the us has virtually no regulation. Injanuary, five tech ceos were asked by us senators about keeping Children Safe. One was Mark Zuckerberg who had this exchange. Senator, ourjob and what we take seriously is making sure that we build industry leading tools to find harmful. To make money. Take it off the services. To make money. And to build tools that empower parents. But to many politicians in washington, its not enough to rely on the tech firms. Theyre seeking to do more with the kids 0nline safety act. Among many provisions, it wants to ensure that platforms are required to enable the strongest Privacy Settings for kids by default, as well as creating a duty for Online Platforms to prevent and mitigate specific dangers to minors. And while this act has bipartisan support, its not law, yet. Many hurdles remain. Not least, as one analyst says, this bill still rests on the premise that theres a consensus around the types of content and design features that cause harm. There isnt, they add. And if the us is considering legislation to keep Children Safe online, the eu is already acting. It is really the time now for europe for us to set our own rules. We will make the online Environment Saferfor everyone in europe. The Eus Digital Services Act was passed two years ago. Its a vast piece of legislation. It includes a raft of rules to protect children. The eu calls this a world first instrument, addressing issues such as cyber bullying, illegal content and the simplification of terms and conditions. And then within the eu, each country can set further rules. For example, in france, Parental Controls are mandatory on all new devices. Social media platforms must verify a users age and obtain parental permission for under 15. In fact, president macron wants to go further with a curb on childrens screen time and social media use. And hes compared the online world with a jungle. Translation does anyone send their child into the jungle at five, | ten or 12 years old . No one. Today, for several hours a day, we open the door to the jungle. But getting political consensus on what to do about this is hard. Thats not an issue in authoritarian states like china, children there can only play online games for an hour on fridays, weekends and holidays. The chinese version of tiktok, douyin, limits under 1a to a0 minutes a day. And across all platforms, china has screen time limits by age. So if you between the ages of 16 to 18, you can spend 2 hours a day on social media platforms. If youre between the ages of 18 and 16, you can spend one hour, and if youre under eight, you can only spend a0 minutes a day on social media platforms. These restrictions in china require users to provide a lot of personal data. In the west, the issue of users data and privacy is contested, as are many aspects of how best to keep Children Safe online. And the challenge keeps changing. Regulation probably needs to move quickly. It needs to be highly responsive, it needs to be empowered with sufficient resources and to try and ensure that regulation is as agile and as versatile as the tech firms its trying to regulate. Even if governments are agile, enforcing new regulations brings challenges of its own. But theres no doubt a period of increased regulation is beginning. Its an acknowledgement that the approach to keeping Children Safe online so far hasnt been enough. A section of the m25 motorway around london is closed this weekend as part of a 300 Million Pound upgrade. Drivers are being warned to follow official Diversion Routes and expect delays, until the motorway reopens on monday morning. The road will be shut between junctions nine and ten in both directions until six oclock on monday morning. Grassroots music venues should be supported by a levy on tickets at larger arenas and stadiums, according to mps. A report recommends the industry should arrange the payments and make sure the cost isnt passed on to concert goers. It suggests if theres no agreement by september, the government should step in. Meanwhile the owner of the Co Op Live Arena in manchester, which has faced delays and technical problems, says the venue is finally ready. Tens of thousands of people have seen gigs cancelled, but organisers say it will open for a concert by elbow on tuesday. For decades, conservationists across the uk have been culling Grey Squirrels to help protect the remaining red squirrel population. However theres bad news for the reds at a sanctuary on anglesey, where after a long abscence, a Breeding Colony of greys has been discovered. 0ur climate editor, justin rowlatt, has more. The island of anglesey is the last stronghold of Red Squirrels in wales, thanks to this man. Dr Craig Shuttleworth has been trapping and killing Grey Squirrels since 1997. Were using live traps. In fact, weve got one in here. I can here it growling away. We take boxes like these we put them up on the trees. His aim was to clear the island so these guys could flourish. And it