Ah yes - decided to use LBS for the front mech, as a gesture of something or other. Bought it last Saturday, but discovered when I got home that the box said 34mm band, but what was inside was 31mm; went back to change it, but they didn't have anything suitable. "We'll get one in in, should be here by next Saturday"; went back yesterday, and it's still not in - should be in by next Saturday....This is why I usually use Wiggle.
I'm running 46/34 and 12-27, and as long as I choose my circuit carefully (rural Derbyshire), I can get away with the 46 only.