In reply to BusyLizzie:
As per another thread, the problem with Middlefell Buttress is that it quickly fades into nothing much very special (not really 3 stars). It's also used as a scrambling descent by some, which can be frustrating if you are trying to climb it at the time. However, not a bad idea if trying out some leading.
Also in Langdale, however, and right next to MB are all the severes on Evening Wall at Raven. So a similarly short walk in and they are all several pitches long and rather nice climbs. My recollection is that there is nothing technically hard on them at all, but there are some route finding issues and some gear issues. So, for someone seconding, they should be fine, long enough, and with enough interest and catch the afternoon sun. There's also the other long'ish severe - Caterpillar iirc - at the descent end of the crag. So you could do one of the routes on evening wall, descend and then pop up Caterpillar if you had time?
Just a thought