Kieran Williams, nine, let the balloon go at the fete at Catcott Primary School, Somerset, on 7 July.

Two days later it turned up 240kms away at Tony Blair's holiday home, Chequers, in Buckinghamshire!

The balloon was sent to Kieran's home with a personal note from Mr Blair and his wife Cherie.

The note was signed, and included a picture of the Blairs and read: "To Catcott, look who found this balloon!"

Mike Ellis, the school's head, said that he was delighted that the balloon had turned up at Chequers.

He said: "We set the balloons off every year. Before, we've had one land at Windsor Castle so we must be quite lucky.

"Kieran was absolutely delighted when he got his balloon sent back by the Blairs, it was totally unexpected."