Britain's 'kindest plumber' has stumped up almost £13,000 to pay for a new bionic arm for a football-mad young lad born without a right arm.

Charity champion James Anderson, 55, made the generous gesture after being touched by Alex Sparkes’s moving tale.

Alex's mum Dionne Sparkes, 33, launched a bid to raise £12,700 for the arm so the seven-year-old could take a throw-in like the rest of his football club teammates.

The Blackburn Rovers season ticket holder dreamt of getting a blue and white robotic arm bearing his team's rose emblem.

And he was shocked when james told him on Tuesday night: “I’ve just paid for your new arm."

Overwhelmed Alex is seen jumping for joy in a moving video.

He said: "I want it so much. It would make me happy. It would mean the world to me."

Dionne said she had no idea that he was missing a limb until her “headstrong” son was born in hospital without a right arm.

And she said though the lad was “loved” by his pals, he'd spent past birthdays “wishing” his arm would grow back - only to be told this wasn't possible.

But Dionne his new arm would be life-changing following James's generous donation at his home in Burnley, Lancs., yesterday (Tue).