In reply to roym:
I climbed it with two others and topped out just as the sun was setting.
We survived obviously, we had head torches but they weren't massively helpful as looking for red dots painted on the rocks at night with an underpowered head torch (ok ok it was a bike light I taped to my helmet) was hard work, there are cairns dotted along the decent too, but some are misleading.
At one point I down climbed on to a ledge with a large drop, climbing back up was harder than the crux of the route and I had my rucksack full of gear on!
Once we got onto the large scree slope it was pretty plain sailing down to the car (aided by a bright moon).
We were climbing as a 3 and there was a lot of faff involved.
The climbing isn't all that hard, and the hardest bit does have bolts. I can't remember more than 3 bolts on route - but every belay was bolted.
If you've not done big multi-pitch before (placing trad gear) then you might want to rethink.
If you have and are happy to run it out a bit, confident you're quick and the weather is good, why not?
EDIT: it was the beginning of November, 3 days before the full moon. Darkness arrived at about 7pm and we got back in the car at about midnight (going off my logbook) we didnt rush down and I don't remember it being especially cold.
Post edited at 19:16