The parts came this afternoon for the rear brakes, so I came home and well , got on with the job. Luckily the sun came out for me.
After some head scratching I remembered how they went together and I played and replayed with the spring clips arghhh.
And soon enough the passenger side one was done.
Then was the driver side, which needed the old calliper removing and the new one fitting and connecting back to the handbrake mechanism. More problematic, but here it is with the calliper even painted red. All that is needed now is to bleed the brakes.