In reply to All:
Thanks very much for your answers, it is a bit clearer to me now. At first British grades seem incomprehensible, but after a closer look, they may be more precise than the French ones.
We also have a double grading system in France, used only in trad climbing and alpinism. You have the overall difficulty (F,PD,AD,D,TD,ED,ABO) plus the sport grade of the crux, but it is not as precise I think.
It looks as if I can climb up to E1, 5a or HVS, 5b, if I get it.
I'll have a look at the places you advised Lemony, thanks. It should give me a good basis to plan the trip.
Maxim,
PS: If anyone needs information on climbing in the Pyrénées, don't hesitate to ask me. I have loads of sketches, routes and tips for you.