I have just been for the most glorious walk this morning, at Walberswick in Suffolk. Stunning scenery, a part I'd never walked before. I thought I'd mention it in case anyone else wants to improve their fitness a bit and wants some company.
I want to get fitter, and have found the Health Walks run by onelife Suffolk.http://onelifesuffolk.co.uk/our-services/health-walks/
They do a series of walks all over the county, and I think they are nationwide. www.walkingforhealth.org.uk/
It's good to go on an escorted walk, as I often get lost on my own! We walked about 3.5 miles along the river and through countryside back to the cars.This was the toughest level 5 walk, but some are very easy. They will always slow down if someone is struggling a bit.
Before the first walk you have to complete a form stating any health conditions, but there is no charge and no booking ahead needed.Just turn up, the groups I've been with are very friendly, and well behaved dogs can come too.
When I get fitter and faster I may join the Ramblers, but this group is a good starting point.
Good luck with your recovery.