I dont know the UK costs but I assume they would be similar to ours. the game itself costs around 25-50 dollars. I got my last cop for 25 because blizzard (the company) dropped the price on it.

It costs me 15 dollars a month to play. No time limits. They usually just charge your credit card.

WoW has American, Asian and European Servers so you would probably end up on the UK servers.

When you buy the game and set it up based on your location it will give you a choice of the best servers/time zones. You dont have to pick the one it suggests though you can choose whichever server you want. I suggest taking one with your time zone though. I once picked a West Coast US server and couldnt get anyone to play because it was always 3 hours behind me. So When I was getting ready to go to bed everyone was just signing on for thier nightly grind.

At any rate check this forum/website out.

http://www.wow-europe.com/en/

Should you decide to play, book mark these pages because they are very helpful.

www.thottbot.com
www.curse-gaming.com