For those of us who feel it is far 
easier to sponsor runners in the London marathon than actually compete, we can all now engage with those runners, and the event as a whole, by tracking runners progress thanks to a mobile application launched by Adidas.
Visitors to the Adidas website are encouraged to download an app which directs them to enter their friend’s race number so that information including their start time and average speed is then available via the app. The application works by sending subscribers SMS updates about the location of a runner as they tackle the 26.4 mile course.
This is a development on the initial application used for the first time last year which saw 4,320 people use it on the day with 10% of runners tracked.
Closest I’ll ever get to a marathon.