Thanks for the reply. I have already been on the Asics site, but it seems to be really slow to load for me at the mo, and keeps reverting back to another plan I did on it!!
I have joined the running club, which is great motivation, and I've just measured the route we did today and it was just a touch under 4.5 miles, so pleased with that. It was run on the Cotswold Edge, the views are simply stunning and I think that made it feel like a pleasure rather than hard work.
I'm going to think positive, my sister managed the 9 mile Sodbury Slog with minimal training in 2hrs15mins, so I should be ok I hope!!