Bike thieves, Gumtree, and retrieving one's possessions

Tell us what happens Emilia, this is almost as exciting as the bike that got locked.

(although you can fold up your Brompton and carry it with you, it must be very cumbersome. What if you go to the bar, leave your Brompton by the table and someone just walks away with it?)

But in that situation, one ought to look after their Brompton as if they were looking after a handbag or a backpack...