Employees at TK Maxx will swap their desks for treadmills to take part in a charity running challenge.

Starting at 9am, athletes from TK Maxx will complete the length of a marathon, while their desk-bound colleagues cheer them on from the ‘sidelines’.

Ten of the management staff from the head office on Clarendon Road are taking part in the challenge.

To make the task easier they will split the 26.2 miles between them.

They hope to cover the distance within six hours, raising money for Cancer Research in the process.

The ten TK Maxx associates taking part in the challenge will also run the Virgin London Marathon on the April 21.