Ok another admission - In our second season I did the exact same thing at Bovney, not the smallest lock by any means lol. A kindly passer by shouted from the other end of the lock "did you intend emptying the river or would you like me to close the sluices " I did not endure the walk of shame but the sight of number 1 son emerging from the cabin and rolling around on the cockpit floor in hysterical lafter was enough to make me double check everytime now