Serpentine Running Club – central London’s running, athletics and triathlon club. Beginners to national level

100 Marathon Club – for all dedicated runners, good events lists in UK, Europe and Worldwide

Enigma Running – small friendly running events based in Milton Keynes

Phoenix Running – friendly 5k to marathon, ultra and multi-day timed endurance events based in Walton on Thames (not exclusively)

Saxons, Vikings and Normans – small friendly marathons and challenge running events in Kent, South East England and now in the North and Midlands too

Great Runs. The best running routes in the world’s major cities and destinations.

Strava. A social fitness network that is used to track running, cycling and swimming activities using GPS data.

Marathon Talk. A free weekly podcast presented by Martin Yelling and Tom Williams, all about running. Entertaining and informative. Access via iTunes, Spotify or Marathon Talk’s own website.