Yeah, I think those that are mentioning £150 cameras have lost sight of who they're being asked to recommend for. There are plenty of cameras available for well under £100 that would be more than suitable for an 8 year old who isn't going to be concerned too much with the finer points of image quality!
Just a quick look at Warehouseexpress sorted by price will bring up plenty that would be perfectly suitable around the £70 mark (perhaps cheaper if you shop around).