I don't know about your timelines, but it seems like all my friends are playing Pokemon Go, not their kids. However now Youtuber favourites like DanTDM have featured the game on their channel, it's only a matter of time before you are pestered to death to download the new augmented reality game to your kids tablet, iPod or iPhone.
The game is free, but isn't available in the UK iTunes Store yet, so to download the game you need to fool your phone into thinking you are in the US. You don't have to jail break or do anything mad, just follow this step by step guide I've pinched from imore.com, then switch back to UK mode.
They note that places like South East Asia don't have too many Pokemon 'on the ground' to find, but here in the UK the game seems to be ready to go, with lots to catch via the GPS gaming, already in place.
The first thing you need to do is set up a throw away email address to create a US iTunes account with. You do need a real one, as before you can download anything you have to verify the email account. I just set up a quick account with outlook.com
Then, follow these steps:
You have to set up a Club Pokemon Trainer account, and I found the form to do so in the app kept crashing, so you might want to use Safari to set up an account first, then just log in via the app, not try to sign up inside it. The traffic must be crashing the sign up form within the app itself.
Then you should be good to go. Return to UK iTunes by signing out and then back in with your regular iTunes account. Remember your US account details for future US app purchases you might fancy.
One last little trouble shooting tip- should the app say GPS not found, check your location services are on in the phone settings. You can also get that popping up if you are playing inside, it works far better outdoors. Finally if you are still having problems, download Google Maps & open it and allow it to run in the background.