coruskate said:They could do worse than start by saying, for example: "we know of many cases where stolen bikes were sold by street traders near brick lane market: if you purchase a bike there, we will assume you knew it to be stolen unless the seller gives you proof of ownership". Fix signs with this or similar message to lamp posts in the area and then nobody would be able to wriggle out by saying "I bought it in good faith"
The proof ownership is a good idea. A bike equivalent of the V5 doc?