0:00:10 > 0:00:13Afternoon, all, I'm Ayshah with Thursday's stories.
0:00:13 > 0:00:16First up, it's one of the biggest games in the world -
0:00:16 > 0:00:19millions of people are playing it and today, the mobile game
0:00:20 > 0:00:23Pokemon Go has been released in the UK.
0:00:23 > 0:00:30It's a game for smartphones that anyone over the age
0:00:30 > 0:00:32of nine can play.
0:00:32 > 0:00:34Players search the real world to find Pokemon characters
0:00:34 > 0:00:37and capture them.
0:00:37 > 0:00:40But there are safety worries - children's charity NSPCC says
0:00:40 > 0:00:43players need to be careful near roads and to never speak
0:00:43 > 0:00:48to people they don't know.
0:00:48 > 0:00:50And if you want to know more about Pokemon Go
0:00:50 > 0:00:53and how to play it safely, go and check out the guide
0:00:53 > 0:00:56on at Newsround Online and there'll be loads more on Pokemon Go
0:00:56 > 0:00:57on tomorrow's programme.
0:00:57 > 0:01:00Well, it's been the first day at work for our new Prime Minister.
0:01:00 > 0:01:02Theresa May took over from David Cameron last night.
0:01:02 > 0:01:03Here's what happened.
0:01:03 > 0:01:06We will make Britain a country that works not for the privileged few
0:01:06 > 0:01:08but for every one of us.
0:01:08 > 0:01:10That was the moment that Theresa May, the new Prime Minister,
0:01:10 > 0:01:12walked into her new home, 10 Downing Street.
0:01:12 > 0:01:15Mrs May has taken over as Prime Minister from the last
0:01:15 > 0:01:18person in charge, David Cameron.
0:01:18 > 0:01:21He decided to resign after the big vote, when the UK
0:01:21 > 0:01:24decided to leave the EU.
0:01:24 > 0:01:27Now, whenever there's a change of Prime Minister or government,
0:01:27 > 0:01:33the person leaving and the one taking over have do go to see
0:01:33 > 0:01:36the person leaving and the one taking over have to go to see
0:01:36 > 0:01:38the Queen, so David Cameron, his wife and his children went
0:01:38 > 0:01:41to Buckingham Palace to see Her Majesty and officially
0:01:41 > 0:01:42step down from his job.
0:01:42 > 0:01:44Theresa May was next in to see the Queen
0:01:44 > 0:01:45and that was her big moment.
0:01:45 > 0:01:52She became the new Conservative Prime Minister.
0:01:52 > 0:01:55Mrs May left the Palace and returned to 10 Downing Street.
0:01:55 > 0:01:58She will start work as only the UK's second female Prime Minister.
0:01:58 > 0:02:01Her biggest job, sorting out how the UK leads the European Union.
0:02:01 > 0:02:04Her biggest job, sorting out how the UK leaves the European Union.
0:02:04 > 0:02:05Now to something big that's happening beneath
0:02:05 > 0:02:06the streets of London.
0:02:06 > 0:02:09Deep underground, a giant new railway line is being built.
0:02:09 > 0:02:12It's taking 20,000 workers, 100 million hours of work and some
0:02:12 > 0:02:15seriously big machines.
0:02:15 > 0:02:18CBBC's super scientific reporter Fran Scott has been exploring.
0:02:19 > 0:02:22I'm right in the centre of London at Farringdon station.
0:02:22 > 0:02:25And it might look like everything is normal here,
0:02:25 > 0:02:27but, beneath my feet,
0:02:27 > 0:02:30the biggest building project in Europe
0:02:30 > 0:02:33is going on - deep underground.
0:02:34 > 0:02:36Welcome to the Elizabeth Line.
0:02:36 > 0:02:39The massive project to build this new train line for London
0:02:39 > 0:02:40started in 2009.
0:02:40 > 0:02:42And in the summer of 2012,
0:02:42 > 0:02:44while London was hosting the Olympics,
0:02:44 > 0:02:46massive machines started digging.
0:02:46 > 0:02:49It has taken well over 20,000 workers
0:02:49 > 0:02:52over 100 million hours of work,
0:02:52 > 0:02:54and they've had to move millions of tonnes of mud
0:02:54 > 0:02:57from the 42 kilometre route.
0:02:57 > 0:02:59The digging finally finished right here, where the tunnelling machine
0:02:59 > 0:03:03called Victoria broke through to reach this -
0:03:03 > 0:03:08what will become the new Farringdon underground station.
0:03:08 > 0:03:10Now, they're working on getting seven new stations ready to open
0:03:10 > 0:03:17in about 2018.
0:03:17 > 0:03:22So, how do you go from this...to this?
0:03:22 > 0:03:23It's best to ask an expert.
0:03:23 > 0:03:26Chloe is one of many engineers working to make that happen.
0:03:26 > 0:03:28So, an essential part of any railway is the actual track.
0:03:28 > 0:03:32We're going to lay ours right here where we are walking.
0:03:32 > 0:03:35So we won't be able to walk here in the future?
0:03:35 > 0:03:38No - trains will be running through this tunnel,
0:03:38 > 0:03:44picking up passengers and taking them to their destinations.
0:03:44 > 0:03:47Chloe, this looks incredible. What is it?
0:03:47 > 0:03:51This is a temporary shaft, it won't be part of
0:03:51 > 0:03:53the permanent works.
0:03:53 > 0:03:55We use them during construction to bring materials in and out
0:03:55 > 0:03:56quickly and safely.
0:03:56 > 0:03:57You just crane them in?
0:03:57 > 0:03:59Yeah, pretty much.
0:03:59 > 0:04:00That's brilliant!
0:04:00 > 0:04:02This is one of our escalator tunnels here at Farringdon.
0:04:02 > 0:04:05What you can see now is the final concrete lining being put on top
0:04:05 > 0:04:08of the orange waterproofing.
0:04:08 > 0:04:08Right.
0:04:08 > 0:04:12This will eventually be one of the access points into the tunnel.
0:04:12 > 0:04:15There are lots of parts that make up a working station,
0:04:15 > 0:04:20but this one will not be ready for us to use for another 2-3 years.
0:04:20 > 0:04:25Which is a good job because there are still lots to do.
0:04:25 > 0:04:27Which is a good job because there is still lots to do.
0:04:27 > 0:04:29So I better leave them to it!
0:04:29 > 0:04:32Last up today, some people in Colorado in America are used
0:04:32 > 0:04:34to seeing grizzly bears - but not like this.
0:04:34 > 0:04:36Somehow, this bear managed to lock itself in a car,
0:04:36 > 0:04:39despite not breaking any windows.
0:04:39 > 0:04:41Don't worry, though, the bear was unharmed,
0:04:41 > 0:04:44but the car was a bit of a mess.
0:04:44 > 0:04:53That's all from me but it's a big day tomorrow for Tim Peake fans -
0:04:53 > 0:04:55you'll be able to hear from him right here on Newsround
0:04:55 > 0:04:56all morning.
0:04:56 > 0:04:57Don't miss it!