^ as above, if its mostly city centre driving with a lot of stop/go then your mpg isnt too far off the mark, but could be better...
wouldn't imagine it was the brakes if it's just one of them sticking, if it was that bad you'd probably be driving round in circles.
a general service may sort the problem, especially if its been a while since the air filter was changed. assuming you have no other symptoms (such as poor idle, misfiring, fluctuating temp. readings etc..) i'd sit with fingers crossed until friday and see how it goes.
are you also a member of the "my fecking volume knob does what it wants to and not what i tell it!" club ?
