In reply to HappyTrundler:
I've done the route twice, the first time it was my first E3 on a big cliff and I was expecting it to be hard. It wasn't, it was easy - conditions were good, it was plastered in chalk, and it felt about E1.
The second time was with Andy above and conditions were shit - there was clag being blown up from the sea up the face of Main Cliff so we went round to South Stack where that wasn't happening but it was toothpastey. It felt hard and scary in those conditions.
It's a great route, I don't think it's 5c, there are no big run-outs, it's just a superb, spectacular route. It's not pumpy or strenuous, it's more tip-toeing sneakily around the steepness than actually climbing it. Definitely go and do it, it's a soft-touch and one of the best routes around.