In reply to gingerdave13:
I think the Craggy grades are pretty tough compared to the London walls, mainly because Craggy seem to make the grades harder by making the holds smaller, whereas at the Westway and the Castle they focus a bit more on making the 'moves' more difficult as well.
For example, I think the majority of the routes on the Craggy lead wall are a bit left-right-left-right in terms of moves (except on the big roof), but that above F6a+ they start to make the holds really small! This means that if you have relatively weak fingers (which I think I do) Craggy is tough. At the Westway and the Castle you can do routes even up to about F6c with bigger holds but more difficult moves - so technique is rewarded a bit more than having strong fingers (i.e. the lead roof). F6c at Craggy the holds are really small!
That's my take on it anyway - don't want to seem like I'm having a pop at Craggy though, as I think it's a great wall - but I prefer the Castle for variety, and Westway for big leads.