Finally, the weather let up for a few minutes today, so I carried out some more work.
I’m slowly working through the list of things that were wrong with the car when I got it. Todays task was to remove the 30-year-old radio, and look into why the RH rear window is dead.
Since getting the car, it had a really bad surge at cruise. Internet wisdom pointed towards the throttle potentiometer/position sensor.
It’s finally happened, after many many months of trying, I’m back in a Rover again.