I'm with Nos on this one.
Having a safety chain on a large trailer is going to cause unpredictable and potentially nasty behaviour should the hitch fail. It’s fine when the trailer weight is very much smaller than the car, but in the UK that’s not the case with braked trailers. There is nothing wrong with the current coupling system or legislation.
IMHO there is a general lack of police presence on the roads – walking to uni every day in soton I see vehicles that would no way pass an MOT, not to mention about 1 in 20 people don’t seem to wear a seat belt! Having said that, I have seen the police in Hampshire and Dorset sitting near popular slips in the summer stopping all cars with trailers and giving them a once over.
With regards the B+E test – there’s nothing on the test about wheel bearings specifically. You are tested on coupling the trailer; as part of this you need to check tyres, lights, demonstrate an awareness of load distribution – plus the normal coupling stuff...jockey wheel, breakaway cable...
Are there any stats relating to trailer related accidents?