That's a lot! But I'm not surprised it happened in London. Before I left to live there for a year, I cynically laughed when briefed that London's crime rate is worst than KL. I said, how worst can it be? But I can tell you now, it's worst! E.g. my car was broken thrice in the 10 months of ownership, each time when it's parked right in front of the house.
It's unbelievably a crime infested place.