..just had a mailing from www.rockleywatersports.com
"we have late availablility for watersports holidays to our La Rive centre based on Lake Biscarosse in Landes region of France
1 week £250pp (based on family of four) including tent accommodation and 5 day sailing or windsurfing course..That's a discount of £215pp
Available weeks 13 Aug and 20 Aug
quote RWTF to qualify at time of booking
Looks a brilliant offer to me if you are a sporty family