This was on yesterday: bbc.co.uk/programmes/b0902g4w
It is about running marathons, but the presenter started out with C25K and the programme mentions others who followed the plan, such as Kate Carter, who started the Guardian running blog. The Radio 4 Extra programme is three hours long, so – unless you're doing a marathon! – should last for a few runs.
It's on for another 29 days or so. You can also download it, although it is pretty hefty in terms of MB.
Keep on running 🎶 😊