If its legal in the UK, its legal in any other EU country, even if it is illegal under their own laws. (Just because its legal, won't mean the police over there will not try and stop and fine you!)
This is why motorhomes are able to tow cars on A-frames all over Europe whilst the locals look on jealously! Also the reason that you will see foreign cars over here with caravans who's number plates that do not match the tow vehicle (trailers have their own registration) and vice versa UK caravans in Europe are not required to be registered seperately from the car.
must have passed test after 1997
To clarify, before Jan 97 you will have C1, from Jan 97 on you won't.