Pokemon Go, the mobile game that's put billions on the value of makers Nintendo and led to hordes of people standing around in playgrounds, is now officially available in the UK.

For the uninitiated, you download the app, which then encourages you to walk the streets of your town in search of wild Pokemon.

Walk near one, and the app uses your camera to overlay a virtual reality creature onto your real life surroundings.  

You then throw a virtual ball at it to catch it, whereupon it is added to your collection.

Also overlaid on the real world are pokestops, where you can collect extra pokeballs, and gyms, where you can take your pokemon to train, for later battles with other players.

What this means in practice is there are going to be a lot of people apparently behaving very oddly on the streets.

Here's where some pokemon have already been spotted in south-east London and north Kent:

Have you seen any Pokemon in south-east London and north Kent? Email patrickgg@london.newsquest.co.uk.