I did drop in to Calvi in the '90s with 1 PARA. We weren't allowed to fraternise - a shame really as both 2 REP and 1 PARA were really keen to meet each other.That's probably only because there's so few Brits (of all flavours) in the Legion at present. When there were loads of Brits serving (probably from about the mid-eighties to the mid-nineties), the general consensus among French Officers was that although the Brits were great soldiers in the field, in garrison they were the worst pissheads and trouble-makers, always up for a scrap. I was actually told this first hand by my Company Commander at my leaving do in the 3rd Company's club in late 1986. In his words "If I went to war I wouldn't mind having a whole company of "Brits" (he actually said "Anglais" but as is the norm on the continent, the word is often used to mean all the British to the chagrin of the other nations). But in camp you are a nightmare."
As for the tight trousers, the combats are now a much looser fit. Even then (1980's) we often tried to have baggier ones for the field. The summer walking out dress (khaki trousers and shirt) was always a snug fit. It was a great uniform to pull the tourist birds in Calvi.
(Of course many people in 1 PARA managed to escape from the large hangers at the back of the camp, despite the eagle eyes of the hierarchy that were looking the other way.)