Distance from trailer to tractor unit & allowed overhang?

Acorn:

Diggerlot:
As far as permitted overhang is concerned? … my understanding is that if I don’t overhang more than a meter at the rear, then I can get away with some flashing beacons and I don’t need anything else … is that correct??

Sort of. Not exceeding 1.0m then no specific requirements other than to make it readily visible to other road users so read that as you will but remember that if things go wrong and you could have done better, then you are likely to be expected to have done so.

At 1.001m or 1001 millimetres rear overhang then you need need effectively light board and markers etc- have an enjoyable read of the Con&Use Regs '86, Reg 82 and then Schedule 4 & 12.

Great thanks !!