Replying to Where to go?

I'm going to be in England to study for ten weeks starting April 26th. I was hoping to hit up some dryslope or indoor skiing. I'm going to be in Old Harlow, which is about a 40 minute drive from downtown London, I take it. So, is there anywhere near London that is decent and hopefully has a bit of a park? I'm also down to hit urban. The problem is, I won't have my skis as it is cost-prohibitive for me to take them considering the amount of skiing I will be able to do, so I also made need to borrow or find a cheap pair of twintips around 175-185 cm and some boots size 28.5-29. Thanks!