So glad you scared them off...
My dad told me about his workmate who had some 'special' £18k-ish bike parked outside their building (somewhere around Old St, London E1 or something). They heard an alarm going off, looked out the window to see some blokes trying to wheel it into a van.
Didn't ask what floor they work on but by the time he got down to the road the thieves were gone... with his bike.
