A nine-year-old boy who inspired changes to Northern Ireland's organ donation laws has received a heart transplant after an eight-year wait. Dáithí Mac Gabhann's father had said he is so grateful that his son "has a new beautiful heart beating inside him" and that he has made "amazing progress over the last few days" since his operation. Dáithí was born in 2016 with hypoplastic left heart syndrome, meaning the left side of his heart did not form correctly. His family said they said they were "beyond grateful to Dáithí's donor and their family for making such a selfless decision at the most difficult time imaginable".