The parents of Britain's youngest lung donor have spoken of their pride that his organs saved the lives of two people.
Theodore Omondi, known as Theo, died following a sudden illness when he was just 41 days old.
But his lungs went on to save five-month-old Imogen Bolton and a young adult who was given his kidneys.
His parents, who did not wish to be identified, said the donation had been a "once-in-a-lifetime chance meeting of two little people bravely and and beautifully fighting for life".
They said: "We believe he would have wanted to help others if he had been able to grow up and make the decision himself.
"We are proud of what Theo could do not just for Imogen, but also for a young adult who now runs their body with his two tiny kidneys."
They added: "We know that every breath Imogen takes is a breath for our son. Every birthday Imogen celebrates is also a celebration of Theo's birth.
"We imagine how perhaps someday Imogen and Theo can blow out his birthday candles together."
Imogen became Britain's youngest double lung transplant patient after undergoing a seven-hour operation at London's Great Ormond Street Hospital earlier this year.
She was diagnosed with Alveolar Capillary Dysplasia (ACD), meaning her lungs had not properly formed, but the transplant was a success and she is recovering well at home.
Her parents, Hayley and Jason Bolton, from Brighton, urged people to join the organ donation register, as they praised Theo's "gift".
They said: "There are no words to express how grateful we are to Theo's family for the amazing decision they made, which has saved our beautiful Imogen's life. Without their incredible gift, Imogen wouldn't be here.
"Theo lives on through Imogen, and when she hits her different milestones our family will be celebrating not one life but two."
Sally Johnson, director of organ donation and transplantation at NHS Blood and Transplant said: "Our thoughts are with Theo's parents and his wider family. They are rightly very proud of the wonderful gift their baby son has been able to give to others.
"It is incredibly generous to then share their thoughts and the comfort they feel knowing Imogen and her family and other recipients now have hope and life. Their compassion when faced with the terrible tragedy of losing their son, should stand as an example to us all."