Sorry for the delay... customers, who'd have them!
Has changed now. No flashing on indicators whether engine running or not - they just stay on solid. Hazards are fine. All indicators are lighting up in both cases.
I did get a couple of flashes on indicators after checking hazards, then they stopped again for good.
A bit of googling and it turns out to be a common problem - the relays are in the hazard unit, and they get gummed up. Unfortunately, the mountings for the hazards broke a couple of years ago, and it's held in with a bit of bent wire. A damn good shake and waggling of the connector block and all seem to be working. At least I know what to hit if it happens again.
Most glad not to be learning cambus at my age... (: