So I had a cunning plan.
For convenience it was desirable for me to take one wheel at a time to the local garage. I didn't want to couple up the car because that involves a lot of 'faffing' around. The caravan is parked in the car port nose first and the battery removed. So I would have to insert battery: back caravan out with motor mover; rotate 180deg; move caravan back into car port; couple up car; remove wheel and replace with spare. And so on when the next one needs doing although the caravan would already be in place. Then put it back nose first.
My cunning plan was to avoid moving the caravan out, which meant I wouldn't have to couple up the car. As various members have pointed out this could be a problem due to the jockey wheel possibly moving.
Plan D therefore was to raise the jockey wheel up and get the forks into the slots on the post. This would stop it rotating. Then I placed a sandbag under the jockey wheel and rammed it down into that. Jacked up caravan and it never moved an inch - except upwards

. Exchange wheels and that was it.
View attachment 10229View attachment 10231View attachment 10232