Finally did it, I got the slave cylinder off, you know, the one mounted on the bellhousing. After spending 2-3 hours tussling with various tools in the morning I decided to stop and have a break.
After lunch I resumed, jacked the car up a bit more, which enabled the front wheel to be turned allowing more room to manoeuvre. Starting with the coil spring clamps I manged to get a grip on the front cross member, the mole grips helping keep the clamp in place and the push rod end of the slave. A few turns on the clamp’s bolt was enough to get things moving. From there on it was a hammer on the ball joint splitter tool and then a lever iron to drive the slave through its mounting hole.
Next: freeing up of the clutch pedal.