In reply to GridNorth:
Depends on where you can clip really, if it´ s really something you have to actually climb and clip 5b nearly all the way then 6b/6b+, 40m of it and I might get slightly more generous still!
I listen to the feedback for routes I grade (I only listen, not nescessarily follow it though) and hear from climbers who come from areas with generally short routes and shorter climbing walls (ca 15m) who fade away terribly on longer routes, some accept this is their weakness, some think the grades are wrong!
Th UK tech grade covers such a wide area of French sport grades anyway it´ s not something I´ d get particularly bothered with anyway, English 5b/5c covering about 5a to 7a and sometimes higher.
Post edited at 16:38