Thanks for great messages after I wrote about C25K success at the age of 63.
Just to say - I did exactly what C25K said, took the full eight (I think) weeks and ran/walked three times a week, obeying that voice on the app. I'm sure it is about taking it one stage at a time, and also not believing that because you have never run, you will never be able to. If I can do it, anyone can do it.
Good luck to anyone thinking about giving it a go, and the best advice I had is not to rush - the important thing is to keep going.