Now I don't claim to be an expert on Pokemon CCG. Far from it - why try to remember everything when there's fab sites like Wikipedia out there?!. However, reading the Wiki entry about Pokemon CCG I was interested to learn that it was first introduced in Japan in 1996, following into the US and Canada in 1998, published by Wizards of the Coast.

To learn more about Pokemon CCG, including game concepts, victory conditions, card types, card sets etc please pop along to Wikipedia.

With regards to the UK, in a nutshell, Pokemon CCG is distributed by Esdevium Games Ltd and organised play managed by D & A Games. For more info, again you may like to visit Wikipedia.