My first thoughts also went to Ryanair. (I live about an hour's drive from Stansted so I often book flights for 2p return). The problem is that Stoory's question says 'at the moment'. If this means that Stoory wants to travel within the next week or two, then Ryanair's prices will probably be much higher.
So, Stoory, if you're really looking for a bargain break, tell us which airports you can travel from and when you want to travel. Then ABers will undoubtedly be able to suggest some real bargains. Otherwise, all I can do (assuming that you want to travel in the immediate future) is to point you to the most well-known of suitable sites:
http://www.lastminute.com/
Chris