This morning I tried to start the engine, but nothing happened. All the right control panel lights came on, but no go.
I checked that 12volts was getting to the starter relay, and the starter itself, all ok.
After a bit of head scratching, I remembered from my MG Midget owning days that a light whack with a hammer would cure this problem.
Sure enough, the mooring pin hammer was put into service, and the starter did its stuff.
So - why does this work? And does it mean my starter motor is imminently doomed?