£150 - £350 is a lot of money and with it you will get a very good camera. If you aim at about £200 and search around you will get a good deal. Have a look on internetcamerasdirect for what they offer. Jessops.co.uk have a search facility which allows you to say what you need and it will come up with a fes suggestions - then search for reviews and best prices.
Try to get a rechargable battery model - it will make a difference.