Today, fresh oil, cleaned, lubed & adjusted chain & swapped the rear calliper over with a freshly overhauled one... The piston side pad was a tad low almost to the point where the tabs on the backing plate were touching the disc ...

I dont use the rear brake much so must of been a sticking piston... that calliper will get a strip down when I can be botherd...
Needs a new rear boot... thats booked in for next Sat morn...