Theft Description

I live in a terrace house in Greenwich, south-east London, with a small front area (only 1 metre in from the pavement). I cycled home, unlocked the door, left my bike propped against the step of the front door, and walked through the house to open the back door (intending to then return and carry the bike through the house to the rear garden). I've done the same thing for 8 years, but this time when I returned in under 30 seconds, the bike was gone.