Freeview set top box with recorder
 

Just bought one of these as they're going for a bargain price on eBuyer at the moment (almost half price). Have had some good reviews and importantly has two tuners so you can record and watch something else at the same time.

http://www.ebuyer.com/UK/product/111742/rb/20278967753

Though I'd post the link in case anyone is interested. I've been after one for a while but have been waiting for the price to drop.