Just been down to the local Sainsburys and found an air compressor which is ideal for Bicycle tyres, Air Beds, Car tyres and Footballs with Adaptors for these, a calibrated gauge upto 300 P.S.I. and works from a standard car cigarette lighter socket. the size is quite small 5.5 * 5 * 3 inch. The original price was £12 . 99 reduced to £3 . 25. I think its an in store deal only. They had about 8 on the shelves and not sure if its nationwide.