In reply to jessyb:
In Llanberis Pass -
Flying Buttress on the Cromlech. A classic route, can be done in up to 6 pitches, but never more than 1 ab from the ground.
I think Crackstone Rib is also good, but can't really remember the details. The Wrinkle is also good, but I don't think it's easy to protect the last pitch.
On Tryfan, there are a few options on Milestone Buttress. There are also classic routes on the East Face but these are long routes, so for when you are confident.
There aren't many easy multi pitch routes in the Peak. The only gritstone I've done that is long enough is on Hen Cloud or the Roaches. The Arete or Black and Tans can be done in 2 pitches, I'm not sure if I did though, I did Central Climb as a multi pitch, but that is VS.
In the Lakes, Dow Crag has some classic low grade multi pitch routes. Murray's Route and C Ordinary are both good climbs, Giant's Crawl is another classic, but I've not done it.