Theft Description

My moped was stolen when parked outside of my friends flat (Fairmont House, just up the road from Canada Water station. I discovered it had been taken at approximately 23:25 pm. I left the bike outside, parked on the side of the road, I removed the keys and put the steering lock in place. I went inside the building for approximately 20 minutes, when I returned to the street to ride home, the bike had vanished. Any help would be greatly appreciated! Thank you!