It happens often there despite all the notices. It always seems to be guys with smarter upmarket cars who seem to think they are clever parking there.......
Once watching the Boat race from a friends Barge moored just behind Fullers Brewery a Renault 5 was picked up by the incoming tide at the slip way next to the roadway. To the credit of Renault it floated off for a good 10 mins before it sank. I didn't rate them till then