Thanks everyone for your comments. I'm leaning towards a Class 2 tag and trusting that it will be accepted.
A few years ago we declared a 4.5 t class 3 vehicle at a tunnel toll booth in Europe and paid double we needed to. [too honest]
Should learn from it.
Appreciate all your help. Please comment further, if need be.
Can any one advise which is the most cost effective and best Tag for use on the French Toll Roads, please.
Just looking at at which one - perhaps the Ulys tag appears 'half decent'
Quite a few alternatives?