Hi everyone, thanks for your help.
It has new fuel and it was running earlier this year. But I had a senior moment , when it wouldn’t start , I moved the dizzy slightly on its clamp.
BUT THE SENIOR MOMENT carried on and then set about the dellortos. I know I’m a Pratt, as a senior I didn’t hear the fuel pump ticking away as it had run dry. It was the time of fuel shortages , but I’ve got to live with it.