So you failed to run your 25 minutes today, you failed to open the window on your advent calendar in the 'run' up to Christmas 2014... 

We hope you succeed in your advent challenge and feel the difference in yourself. However, by donating £2.50 a day for every day you fail or forget to run your 25 minutes, we can help make a difference to children worldwide by raising money for a great cause, United Through Sport.