It will be pretty cold, full wetsuit for sure. I've never been to Nottingham, but I've heard good things. There are two full cables in Milton Keynes, about an hour and a half drive, both are really good, friendly staff, friendly locals, wakemk and box end park. I really like the obstacles in box end.
Check out http://system2wakeparks.co.uk
for a list of System 2's around the UK.