What to do if someone has locked their bike to yours?

I had a quick look. Starting at a hundred quid. Hitting £150 for a good one. I'd be happy to chuck ten quid in to know that there was this kind of "insurance" available and I'd happily put my name on a list of people to call who were willing to chop a lock off. We'd need guidelines... like maybe we only ever travelled in pairs (at least) and as a forum we had to be convinced of ownership of the bike?

It seems a bit of a mad suggestion but not too crazy.

I'd put in a tenner too - but as you say it's fairly risky in terms of people accusing you of doing criminal damage, or the plod saying you're stealing a bike that its true owner had lost keys too.

Rules would have to be pretty rigorous e.g. will only cut a bike off if owner can prove they own it, records kept in case of shenanigans etc.

Still willing to try!