My car's currently sorn'd aswell, luckily it was just 2 rear bushes which i ordered weeks ago and they still haven't arrived, my brakes however were fine, measuring 150 on the rear and 310 on the front, could the seals in the rear pistons be knackered? also, braided hoses increase efficiency as they prevent the pipes from expanding more,
You can get a set of 4 goodridge brake hoses for £49 delivered on ebay, or contact eb spares etc,
does seem weird if you've just had the rear serviced though, what measurement did the MOT garage pick up on the rear? the rears are never that strong to bite as the bias is 50% lower on the rear if i remember?
I wonder if it's worth getting some yellow stuff pads for the rear, it's a very cheap brake upgrade, if you go directly to EBC's website, i think they're around £46 for the GTV TS and have to say they're probably the best pads i've ever used apart from carbon ceramics on my dad's DB9 which is a different league!!!!
You've just been done by a Twinny!