In reply to FinlayThomson:
Hi, just back from Tignes, and went to visit the climbing wall, the bouldering is not up to much (routes not graded nor clearly marked, seemed a bit random and mixed up - in the words of one local I asked) , and I had kids running under me as I climbed, so gave up after a short while. The lead rope set up looked good though and if I go skiing again to Tignes I will bring rope and harness. I can confirm that liquid chalk is required, it can be bought at reception it seems. I paid 5 euros to get access to the wall, so very cheap compared to London!