Fly with Ryanair from London STanstead £35 each way, they will also carry boards £15 each way if you warn them in advance, just make sure they are packed well! when you get there, catch the bus to Anglet, just down the coast, and then find Fontaine de L'aborde, which is up the same street as the Auberge de Jeunesse (youth hostel).
This is a wicked campsite with a really chilled out bar and shop, mainly surfers. If possible book it in advance as it can be rammed full. Just down the road from the campsiote there is the beach and the town of anglet, then only problem is the supermarket is a bit of a trek, but you can get all the food and beer you need at the campsite shop.
Also in the town of Anglet (5 min walk) there is plenty of surf shops for hiring/buying boards, or you can go to Biarritz proper on the bus 1euro20 per trip, buy a week pass if you are there for a week, and go to the casino
and lose all your money on the first night
.
I have just got back from another awesome surftrip there with the boys, and it was mad fun. any questions message me ZOLTAN