This is the final image that loving North Yorkshire mum Kelly Frank keeps of the nine-week-old son she has lost - and she will treasure it forever.

Little Aden Zac was lavished with all the care Kelly could give him during his short life, but he died on October 16.

This picture, taken shortly before he died, will form part of 'Aden's Wall', a memorial to him which his mum is assembling at her Malton home.

Aden died in York District Hospital, from a serious heart problem. His blood didn't have enough oxygen for him to survive.

Though doctors detected the problem, surgery was needed to correct it and Aden's tiny body would never have withstood an operation.

For the first few weeks of his life, Aden lived and put on weight like a healthy baby.

But after five weeks came the first warning sign of the tragedy to come, when Aden's hands and lips turned blue. He was taken to hospital but released soon afterwards.

Kelly, 18, said: "From that day, we knew there was something wrong, but not how serious it was, and for the next few weeks his health was fine."

However, on October 12, Aden started struggling for breath.

He was taken to Leeds General Infirmary where, after tests, Kelly was told the worst.

She said: "I suppose I appreciate their honesty. They said if he had another attack he wouldn't survive, so it was best he spent the next few days with his family."

On October 16, the attack came, and Aden was taken to York District Hospital, where he died in his mother's arms.

Kelly said: "He was not in pain at all. We were pleased when they told us that, and he had to have hundreds of tests, so we are glad he doesn't have to go through those any more.

"He seemed to know what was happening, as the doctors took all the tubes off him, and just before he died he opened his eyes and gave a little cry.

"It was a very hard, very emotional time for us all, but I think that having a bit of time to prepare for it helped. I knew that I had to be strong and I tried my best."

Aden's funeral was held three days later, on October 19. Kelly said it was "the hardest day of our lives".

She said: "It was tough, very tough for all of us, but our family and friends have been brilliant. It has been them that has got us through it really."

Kelly is now making 'Aden's Wall' in her living room, helped by her mum, Debbie. It features many memories of Aden, including a handprint taken while he was in hospital.

Kelly said: "We are just taking it one day at a time at the moment. We have to. But we'll never, ever forget him."

Debbie paid tribute to the staff at both hospitals where Aden was treated, describing them as "absolutely brilliant".

She said: "They were so good to us both. If anyone is thinking about making a donation to charity, they deserve it as much as anyone else."

Any donations should be sent to the Infant Research Unit at Leeds General Infirmary.