A teenager has discovered he can give his brother the greatest present of all – the gift of life. 

Harry Simmons’ struggling kidney will be removed in the coming weeks as it battles to filter his blood.

The organ has kept him alive since the 12-year-old’s first transplant when he was just two.

But now his older brother Ben, 19, has come to the rescue, bravely offering to give up own of his own organ to help his little brother.

Harry, who lives in Southwater near Horsham, said: “The problems with my kidneys make me sad but also worried.

“It’s exciting to get a kidney from Ben.”

Stepdad Christian O’Malley added: “Ben was as happy as anyone when he found out he was a match. It is a great thing to do for somebody, especially your brother.

“Quite a few members of the family have volunteered to be a donor.

“Everyone is well aware of Harry’s situation and anything they can do to help they will.”

Harry, a pupil at Tanbridge House School in Horsham, will have his failing kidney removed and be put on dialysis until his body is strong enough for the transplant.

Mr O’Malley said: “Harry’s had a kidney defect since birth. He’s had numerous hospital trips and misses quite a lot of school because of it.

“He can be full of beans one day and drained the next.

“Harry is such an amazing boy. He seems to carry the same spirit as all the other children I have met at the Evelina Children’s Hospital in London.”

Mr O’Malley is running the London Marathon to raise money for the hospital in April.

He said: “Sometimes as a parent you do feel helpless and you are in the hands of the hospital staff.

“They are a fantastic bunch of people.

“I have all the incentive in the world to run mile after mile.”

Sponsor Mr O’Malley at uk.virginmoneygiving.com/Christian.OMalley.