When we first had our van the radio worked fine but it was gradually getting worse. The aerial (photo attached) came loose from time to time and I kept tightening it up but it made no difference. Last month I removed the radio to check connections and the only accessible potential problem I could find was the screw connection for the aerial mast. On the grounds that I couldn't lose anything I stuck the end of the mast into a jar of petroleum jelly before screwing it in again. We've since been up to South Shields and back then over to Oldham, down to Cardiff and back home to Tees-side and the radio has been fine. A similar solution might be worth trying by anyone else having reception problems.