Towpaths and stuff I’ve heard of but usually local scrotes just trying to nick any old stuff from people passing by. Then I’ve heard of a couple of attempts in Surrey Hills. One on Pitch a few years back where supposedly someone got chased and then the Leith incident recently, but not convinced these are anything more than people dicking around, just happen to be there and maybe chancing it.
This one at FoD sounds more serious and maybe targeted.
Though from stories I’ve heard, usually at trail centres and such the targets are unattended bikes at car parks, or items in cars. Plus the classic of being followed home, though not sure this has ever been proven.