Carson is taken from Winchester to University Hospital Southampton’s PICU.

The round trip for the SORT team takes two hours, and there is good news: a bed for him has been found.

Griksaitis says the team is “going above our patient numbers because we can’t turn away critically ill children,” and explains that the hospital has “obviously managed to do something while I’ve been gone”.

The pressure is so great in winter – there have been times when every PICU in the country has been full.

The Southampton unit has a total of 16 beds, but on the day I film it is fitting in 18 patients.

Griksaitis says that is thanks to the staff: “Nurses have come in on days off. Nurse have given up their time to come and allow us to open an extra bed.

“Everyone wants to help children, so people will sacrifice their own time at home to do that.”

In the safest place for him, Carson underwent a range of investigations.

It was confirmed that he had bronchiolitis and he spent a short time in intensive care.

He was soon back home again.