Pogo has announced they will close Pogo UK (and Club Pogo UK) on May 21st:
Important announcement! We will be closing both the Free and Club Pogo UK sites on May 21, 2013. This allows us to focus all of our efforts on a single Pogo.com site, and we hope that you will join us.
UK players are encouraged to continue to play on Pogo.com to enjoy the games, badges, and features they’ve come to enjoy on Pogo UK. There is no word on how this will affect Scrabble and the US prize drawings, although it’s likely there will be no change; players outside of North America will continue to be locked out.
Also according to the article, effective immediately, Pogo will no longer provide UK releases/versions for the following games
The Pogo.com site will continue to provide daily US Trivial Pursuit and Crossword Cove puzzles (and BadgeHungry will continue to provide the US TP and CC answers each morning and the UK ones as long as they are available) and between now and May 21st any episodes released for Clue and Claire Hart will be found only on the Pogo.com site.
Thanks to everyone who wrote in with the news.