"And another small job done today, changed the clutch fluid, horrible, 18 year old black stuff replaced with nice new Pagid DOT4, (cap says DOT3 but I'm sure it will be fine). May help with the stiffening clutch pedal when sat in traffic."
I had the same issue on Friday night travelling on the M25 from Guilford , loads of traffic, clutch stiffened up to the point I thought my left foot wasn't engaging with my brain.