I have not been able to access the game for 2 days now on any device....
Is the game down? Is there a problem with UK access?
Can anyone offer any advice?
Try accessing the game from a different internet connection. That means try using your mobile device's service provider or on public wi-fi, something that is a different ISP.
I think its your browser. Are you using Safari? I'm getting the same problem with Safari. It was working fine until the new season started. It works perfectly using Firefox. Try switching to that or another browser.