No points, just a fine. Whether they can follow you (in the post) to UK I don't know, but if you don't pay, just expect the police in France to be a bit heavy when you come back and they catch you again.
Anyway, the critical bit is don't expect to get away with a bit over the limit (just like in the US), the limit is the limit, not the limit +10% +2 like in Blighty.
I'd hate to read of somebody appealing for help to get their car back from the French Police.
And as far as I know the Dutch are very polite and honest about it. Ever been clamped in Amsterdam? It's almost an enjoyable experience - but that's another thread