I can understand that this gentleman thought the house was unoccupied because of the overgrown garden, but when he found a spotless interior, and fresh food in the kitchen - didn't that make him stop and think?
the UK is the land of milk and honey; all derelict houses have a well stocked kitchen and full utility services running, just in case someone decided to break in and squat.
I hope the garden is better kept in the lavish hotel he's no doubt staying in now.