Six-year-old organ donation campaigner Dáithí Mac Gabhann honoured by Rishi Sunak

Mr Sunak shared the letter he wrote to Dáithí', in which he praised the boy for "helping others in your situation to get the life-changing help they need." (Twitter: Rishi Sunak)

A six-year-old at the forefront of the campaign revolutionising organ transplants in Northern Ireland has been presented with an award from the UK's highest office.

Dáithí Mac Gabhann and his family had been campaigning for years to overhaul Northern Ireland's organ transplant system and bring it into step with the rest of the UK and some of its European neighbours.