Just realised - I've been going out running for a month, as of yesterday.
If I'm honest, my progress through the stages on the Couch to 5K app on my phone hasn't been as rapid as I'd have liked, but then again I was starting from virtually nothing in terms of any kind of base fitness. I'm still following the walk-run-walk-run pattern but it's definitely getting easier, to the point where I've tried to up my pace a bit, particularly towards the start of a run only to then crash and burn towards the end.
I've noticed the difference on the scales too - have lost about 5 lb in weight in the last month. Enjoying it way more than I thought I would - I think it's a combination of the fresh air and the isolation of being out on my own with just music for company, plus the rewarding feeling afterwards that I've done something for the betterment of my health.
Thank you to Platypus for starting the thread and to all of you for keeping it alive - the inspiration you have provided looks like sending me into my 50s in a couple of years time in way better shape than I dared hope