A teenager took his mum’s place to complete a 26-mile MoonWalk to raise cash for breast cancer research because she suffers from mobility problems – despite having recently been on crutches himself.

The Comet: Sam with his aunties Amanda and Tania after the walkSam with his aunties Amanda and Tania after the walk (Image: Archant)

Samuel Pearman, a 15-year-old pupil at Stevenage’s Nobel School, stepped up to complete the event with his two aunts because mum Sarah Dhar has conditions including fibromyalgia which stop her from walking long distances.

Sam even donned a carnival-themed costume for the walk around central London which his mum and aunts completed 10 years ago after their aunt Christine died from breast cancer – although he did leave the walk’s trademark bra on the outside.

Sarah said: “He said he would step up and take my place and I was really really pleased that he did it.

“We didn’t even know if he was going to be able to take part as he is only 15, but it turned out to be fine.

“It’s really nice, he’s shown me that he’s really growing up.”

When Sarah completed the walk in 2006 with sisters Amanda and Tania, the trio were known as Chrissy’s Little Angels, after their late aunt.

In recent years Sarah has been diagnosed with fibromyalgia and chronic fatigue syndrome and has other conditions which mean she suffers a lot of pain. Sam himself has problems with his ankles and only recently had to use crutches to get around.

But Tania said he never once complained about the gruelling walk.

She said: “We thought it would be lovely if we could have a little reunion and do the walk again but we’ve kind of taken for granted how little my sister can do now.

“He’s a great lad for a 15-year-old and he was over the moon that he was able to do it for her. He was a little bit embarrassed and shy about doing it because of the cause.

“I thought he was going to be the typical whingeing 15-year-old but he was absolutely amazing.

“Not once did he turn round and say he couldn’t complete the walk.”