Possibly a sticking brake pad?
Take a look at this: http://www.popularmechanics.com/cars/how-to/maintenance/4317748
Richard
1.8i Mk2 Solar Red, 16 inch square spoke wheels, MGFMania hood with zip-in glass rear window, DRLs, Kmaps ECU, Pipercross panel air filter, MGOC Supersports back box & some cockpit bling