With both. I have tried with the handle when the electric starter wasn't successful, with no luck. But once (and just once) when everything was cooling down and the engine had been switched off for over an hour, it wouldn't start on the starter, but then I put the handle in and checked the spark off the coil lead as I turned it over (a good spark) and then I reconnected the HT lead and turned the handle round to line up the prongs (?) with the slot in the bumper ready to withdraw the handle, it started. I put this down to more cooling as a result of raising the bonnet. But having started it, I drove home - there is a limit to how long they want cars to sit in a supermarket car park. Yes it would have been nice to switch it off again and see if it restarted, but I didn't dare, in case it didn't.
There is oil in the dashpot. The piston does slide smoothly. I didn't know there was a float chamber breather! Where is it?
Jim