Temporary structures are up to 28 days.
are you going to move it that often?
dont forget if its over 30m2 floor area it needs B Regs, whether it needs planning or not.
Stainless steel cant be cut with Gas Im told.
iv'e allways fancied afull lenth 100ft winch cable fastened very securly up near the hitch of the trailer and to something very solid behind it , curling it up out of sight i'd be a real shock to the system to get stopped instantly at 15miles an hour
mine has a 3m chain just enough to make them stop, and hopefully enough noise.
I have them on mine,
they seem brighter, but I used led bulbs, (make sure you use directional ones, as there isnt a reflector.)
the wires have 15 amp male ends that wont quite fit in the disco plug, a few wipes with a file and they do fit.
one more thing, make sure you use sealant when fitting as they dont have body seals.