Prime Minister Theresa May pledges support for Carter Cookson, the South Shields baby who needs a lifesaving heart transplant

Prime Minister Theresa May today called the plight of a South Shields couple who have weeks to find a new heart for their baby son as "tragic".

Sarah and Chris Cookson used the tragedy of losing their first son to set up a charity, the Charlie Cookson Foundation, which supports other families facing life-threatening conditions.

Carter Cookson needs a heart transplant to save his life after an operation to fit a pacemaker failed.

Carter Cookson needs a heart transplant to save his life after an operation to fit a pacemaker failed.

They were overjoyed when Sarah, 44, gave birth to a second son, on Boxing Day, but quickly had to face up to fresh heartache as their second baby, Carter, fights for his life.

He has serious problems with his heart, and after an operation last week to fit a pacemaker was unsuccessful, they have been told his only hope of survival is a heart transplant.

Related: Parents of Charlie Cookson ask people to 'pray' for baby son Carter after heart operation

Doctors at the Freeman Hospital in Newcastle told the family a new heart needs to be found for Carter in the next five weeks, prompting them to launch their #findaheartforcarter campaign.

South Shields MP Emma Lewell-Buck raised the Cookson family's plight in Parliament.

South Shields MP Emma Lewell-Buck raised the Cookson family's plight in Parliament.

Today, South Shields MP Emma Lewell-Buck backed their campaign by raising the tot's plight at Prime Minister's Questions in the House of Commons.

She told the House: "My constituents Sarah and Chris Cookson lost their little boy Charlie in 2013.

"Since then they have devoted their lives to helping other families and children with life-limiting conditions via their charity, the Charlie Cookson Foundation.

"On Boxing Day they gave birth to Carter John Cookson. He had three cardiac arrests in one day.

Sarah Cookson holds baby Carter for the first time at the Freeman Hospital in Newcastle.

Sarah Cookson holds baby Carter for the first time at the Freeman Hospital in Newcastle.

"After an unsuccessful operation he is now fighting for his life and in need of a heart transplant.

"Carter's only been given a matter of weeks to live. Will the Prime Minister join me today in raising awareness to help us find a heart for little baby Carter?"

Related: Parents of battling baby Carter Cookson thank community for supporting transplant appeal

Mrs May responded by commending the work the Cooksons have done with the Charlie Cookson Foundation in raising funds for those children and babies with life-threatening conditions.

Theresa May called the Cooksons' case 'tragic' at Prime Minister's Question Time in the House of Commons.

Theresa May called the Cooksons' case 'tragic' at Prime Minister's Question Time in the House of Commons.

"I am sure the sympathies of the whole House are with the family at this very, very difficult time.

"What I will do is ensure that the relevant minister at the Department of Health and Social Care meets the honourable lady (Mrs Lewell-Buck) to discuss this issue further.

"We do want to change the culture on organ donation to save more lives.

"That's why we are planning to introduce the new opt-out system in England from 2020.

"The new law will be known as Max and Keira's Law, in honour of Max Johnson, who received a new heart from Keira Ball, who sadly lost her life in a car accident.

"It's a tragic case that the honourable lady has outlined, and I'll ensure that the minister from the department speaks with her about it."