Well yesterday, I had the starter solenoid fail.
Started off at the house ok, but a quick stop at the petrol station and it wouldn't restart. I could hear the solenoid click in response to the starter button, but no motor action.
Bridged the starter terminals of the solenoid with a spanner and it fired up okay.
I don't see any markings on it, probably replaced before.

Looked up Fowlers, 1D001697R supercedes 582906, €65.73
Ordered a couple of these instead at €7.69 (£6.62) each (can be bought with/without 4" flylead plug)

Starter Relay Solenoid for Honda Shadow 750 600 CBR600 F2 F3 CBR 900 929 CB750 CB900 CBR900 CBR1000 GL1500 VFR 800 750 VT600
https://a.aliexpress.com/_EjIu3GGIn the meantime, I used the car today (kids on half-term) but if needs be, I'll just use the spanner until the postman arrives.