Ah OK so £140 is well within budget then!
At that sort of budget you can go pretty mad and look at "Bridge" cameras but I don''t really think that's what you're after.
Whatever you do don't get mugged into thinking it's all about most mega pixels, it's a marketing lie. Infact too many picels on a small senser results in aweful images in low light due to digital noise. Anythng over 8 is a waste unless you plan to print stuff on A2 or are cropping a lot of excess shot out.
Nick