I think the issue here is that the tyres should be checked regularly. With a car they at least get checked once a year at the MOT (although really it should be far more often than that).
On a caravan the same isn't true, they could be sat for several years without moving or anyone looking at them, so it could possibly be argued that not checking them before use is negligent
I wasn’t there... but, basically that’s what the Police Officer pointed out.
They might LOOK ok, but sat in a muddy field for a long period, might not do them any favours. Probably a lot of old caravans / trailers on ORIGINAL tyres.
(NB: Luckily, he’s experienced... so control maintained & no damage.... just inconvenienced).
Bit of reading material...( Finding your tyre age amongst other things)
There isn’t a legal time limit for CARS to replace tyres. BUT;
It seems that 6+ years (inc spare) is a good time for a change, due to natural deterioration.
https://www.petebarden.co.uk/news/articles/how-old-are-my-tyres.html