Sadly, the D Lock probably wouldn’t have worked either.
My commuter hybrid was stolen from Crawley station the very first time that I left it there (with a DLock)
You can imagine how annoyed I was, after getting off the train, feeling smug because I wasn’t going to just miss the bus then wait ages for the next one.
After that, I used to take my bike on the train with me. I stopped working in London before the trains with guards vans were retired, so never had to work out an alternative.
The only real solution is to never leave your bike unattended, but that’s not always possible, if you have to use your bike to travel to places like sports centres.
I will keep my eyes peeled – if I see anybody with it, they may find out out how heavy I am.
Scum!