In reply to RLimmer:
> 1. Does anyone know of any 'proper' indoor multi-pitch climbing walls? by proper i mean walls in the region of 40m high?
I don't think there are any climbing walls which are 40m high, certainly not in the UK anyway. The climbing Wall at Kendal has a half way belay ledge for multi pitch climbing, main wall is about 23m high. However I don't think I've ever seen anyone bother to use it.
> 2. What do people think the uptake of a facility of this size would be?
Low, people go indoors to get a lot of routes done in one session, not to faff for ages on a multi pitch set up. Would be better to have a wall no more than 28m which people can climb in a single pitch with a 60m rope, any more and hardly anyone has a long enough rope. Then maybe have a bouldering wall on a floor above.
If you genuinely are interested in the possibilities of the space, e-mail me as I design climbing walls for a living.