I hyave now heard from Montrail UK.They state that the law written in 1984 stipulated that the trailer must have a MAXIMUM of two wheels, the relevant chapter and verse will forthcoming later, but here is where the confusion lies, the law maklers had no idea that it was even possible for a trailer behind a bike to have a single wheel, what they where trying to avoid was four wheels, or maybe (??) three wheels etc, so it is a maximum of two wheels behind a solo motorcyle in the UK.Visitor rules mean that anywhere you can legally take your bike, the same applies (EU or more).
Thanky you JWC, how many have actually riden with a single (or double) wheeled trailer behind your solo?
you forgot to post the picture of the Jota plus trailer
CLEM