HI Norm and Max,
Much thanks for your replies and assistance.
I was very much conscious when I tipped it over to ensure that the carby was always on the topside/upper, as I did know about the potential for oil to go into it. So that shouldn't have been the cause.
The last time I started the mower it went first pull - that was several months ago but as I knew I'd not be using I full drained all the fuel, including via a carb drain and even put a teaspoon of oil in via plug hole.
Anyway to keep simple I will try your suggestions and report back. Much thanks :-)
