From Will Pomerantz's Lunar X-Prize blog:-

"since announcing the prize on Thursday of last week, we’ve gotten well over 100 emails from teams around the world wanting to sign up! Universities, companies, or individuals in 22 countries thus far have stepped up and informed us of their strong interest; soon, we’ll start getting these teams actually registered and announcing them to the public."

Here's hoping. As soon as I learn of any UK entry, I'll post it here.

I'm sure our very best minds are already hard at work on the problem :-)