I wandered into Winter Wonderland with friends this week. Actually it was pretty impressive - a huge Christmas-Market-with-Funfair / Circus Attractions / Ice Rink etc etc with lots of noise, warm waffle smells, even fake snow. Entry is free but everything else was a bit pricey for our unprepared budgets sadly (and you need tokens we hadn't sorted out). But I might go back to do a couple of rides when more flushed! On until 3rd January.
http://www.hydeparkwinterwonderland.com/
http://www.hydeparkwinterwonderland.com/