My pet motoring peeves are:
LED replacement bulbs (not applicable to vintage vehicles Tim) beeing promoted and espcially those who say "i've got them and my car pased the MOT so it must be OK"
Deletion of emissions control equipment on modern diesels. For example EGR valve blanking n DPF removal. Supposed to be checked by MOT but the testes not even allowed to pull the plastic cover off the top of the engine so how is he supposed to know? Agian lots of people proting this on car forums and denying that it's illegal.
If you wnat to know the law on trailers etc go to a carnival and ask a driver. Their packed up rides and caravans often push the regulations to the mm and kg limits
Trailer laws don't apply to "mobile plant" so when looking to transport one of my larger gas turbines on a Sankey trailer (don't meet current regulations) beind the land rover I just took the trailer body off and bolted the engine to the chassis – mobile plant (compressor / generator) problem solved. And I did get asked once, soon as I said mobile plant the copper backed off muttering to himself.
Robert G8RPI.