How to secure a boat trailer against theft?
(a) when parked on its own,
(b) when on the tow-ball.
What experience, good or bad, do you have of different locks/systems?
What do you recommend or advise against?
I use one of this type when the boat is at home, or left in a dinghy park. It's enough to deter the passing crim. But if someone's serious, then not very much will stop them, so make sure you are insured :)
That looks like the twin of the one on ours. From Screwfix.
If that style has served you for a good many years, (and your boats are visible form the road IIRC, for any would-be-felon to see), I should relax.
Graham N said some useful things on HBBR forum, and finished (like you) with " ... use reasonable physical deterrents, have good Insurance and stop worrying".
Perhaps we'll meet on the water before too long!