Pupils are preparing to complete an annual run to and from central London to raise money for charity.

Children and staff at Harrow School, in High Street, will complete a run to Hyde Park on Sunday in their 25th annual Long Ducker run, with approximately 100 of them running the 10 miles back the other way.

Cash raised will go the Christian Livability charity, which campaigns for the rights of disabled people and provides support to encourage independent living.

Reverend James Power, the school’s chaplain, said: “Over the past 25 years Long Ducker has grown from relatively modest beginnings into one that involves the whole Harrow community – boys, masters and support staff, governors, parents and grandparents, Old Harrovians and friends – with the result that it raises significant sums of money for charity.

“We hope this year to celebrate our silver jubilee by raising over £100,000. Livability is a worthy recipient of these funds in a year when we have been challenged by the achievements of those with disabilities in the Paralympics.”

The school’s relationship with the charity goes back to the 7th Earl of Shaftesbury, who when a pupil in the 19th Century witnessed the mistreatment of a poor man’s dead body by drunken coffin bearers and led to become involved with the Ragged Schools Union, which eventually became Livability.

Rev Power said he was “delighted” that the Earl’s successor, Nicholas Ashley-Cooper, will be on hand on Sunday to give out medals to the runners as they cross the finish line.