You can see in this pic that the stake on the RHS of the boat has just pulled out of the ground. A tie-down point at the stern would have stopped this - just a loop of rope over the rudder pintle will do.
The wind had dropped below the point where boats were being lifted into the air when we arrived on the scene, but the pressure of the wind on the upturned hull was very noticeable. Particularly when I found myself carrying the transom of the errant boat whilst standing between it and the other one, trying to persuade it to go back onto the trolley.
Bad light stopped play before we got round to this little lot....
Pictures courtesy of Iain Christie.