In reply to Tom Valentine:
> Where does the orange zone classification come from? ( Sorry for being so ignorant)
OP is referring to the colour codes in the Rockfax guides I think.
For sheltered slabs on the Eastern side:
Lawrencefield? (Limited, but there are a couple of quite good routes on the Gingerbread slab)
Yarncliffe? Zapple is (just about) a slab route, but likely to be a bit green and greasy I fear.
Froggatt maybe?
Oh. Dur! Rivelin.
Left Edge is bold, but fab. Fringe Benefit is a wee bit above the grade you're after at (a relatively soft) E1. Or you could possibly chuck a top-rope on the Brush Off.