i had a breif look, and there does seem to be a slightly visible line on the disc which could suggest a bit of dirt, but thought i would ask opinions before i take the wheel off so i have some kind of idea what to look for.
ill swing the caliper up tmora night, ill just have to take it easy into work and back.
i presume removing the pads and checking wont require a fluid bleed? silly question maybe, but im new to this mechanical stuff.