In reply to Richardlake:
hey Rich,
Orco is a great, relaxed valley with multiple huge cliffs and sensational climbing.
Overall, although there's a lot of cracks, they are cracks of all different types, whilst the climbing leans very much towards a UK trad style rather than towards pure splitter crack climbing. I used to bail there in the Autumn when I was living in Chamonix, but my climbing buddies, who were invariably foreign climbing guides, tended to find the style quite tricky, whilst I loved it. As i say, because of its diversity and oddness, I think it really suits someone with an extensive UK background.
There are quite a few single pitch opps, and a large number of 2-3 pitch routes, though some folk often do the lower pitches to the bigger affairs. I've never come across a pure bolt line, though some of the slabbier pitches have the occasional bolt/peg. HVSwise, I'd think your partner would find the climbing a bit too challenging..
Your main difficulty may be the heat. The main cliffs all face south and there's no way I could ever climb there in August. I've often climbed there in 15-16C conditions in October and found it super warm.
Personally, if i was looking for a mountain setting in August with lots of diverse climbing, I'd favour the Aiguilles Rouges in the Chamonix valley, the extraordinary Briancon area which has something for everyone, or, better still, perhaps the much under-rated central Switzerland if you're happy doing a bit more driving from crag to crag.
I'm in Sheffield too if you wanted to peruse the odd guidebook to any of these areas..
John C