When I had a caravan I used one of these http://www.jsbhublock.co.uk/
At the time it was claimed that no-one had lost a caravan fitted with one of these as they resist angle grinders and oxy acetylene removal attempts

Last edited by Marchogion; 24/05/20 09:20 PM.
John

2014 +4, Le Mans Blue / Magnolia
"Meg" the Mog