A seven-year-old boy saved his little brother’s life when he suddenly stopped breathing – having learned how to resuscitate from watching Casualty on TV.

Jayden Hughes and three-year-old brother Kyran were watching television when without warning the toddler collapsed in their West Watford home.

The Holywell Primary School pupil sprang into action, administering three rescue breaths on his baby brother and bringing him back to life.

Proud mother Kirsty Hughes said she was in a state of shock as the drama unfolded shortly before 6pm on Monday nigh.

But Jayden, despite his age, took charge of the situation.

The 27-year-old teaching assistant said: “It came out of nowhere. I’m not really sure what I was thinking when Kyran stopped breathing – I was in shock myself.

“I called 999 and when I was on the phone to the ambulance, Jayden started giving Kyran the rescue breaths. He came round after three and started screaming, which was a good sign.

“It all happened in about a minute or so. My son basically saved my other son’s life. I’m incredibly proud.

“I dread to think what could have happened.”

By the time paramedics arrived at the Hughes’ flat in Flete House, Croxley View, Kyran was breathing on his own again.

He was taken to Watford General Hospital and admitted overnight.

Stunned family and medics quizzed the seven-year-old hero on where he’d learned first aid – his answer was even more surprising.

Ms Hughes said: “The paramedics asked Jayden how he knew what to do, and he told them he’d seen it on TV.

“He’s always watching Casualty and all the medical programmes. I’m glad of it now. I’m impressed with him.”

Kyran is now home and well, but what brought on his collapse remains a mystery.

Ms Hughes said home life has returned to normal, but Jayden has shunned any kind of praise for his life-saving actions.

She said: “The hospital aren’t sure what happened to Kyran, but he’s home okay again now.

“Jayden is a relaxed child, he understands what happened but he doesn’t think too much of it himself. He doesn’t like to be the centre of attention."

“But a couple of members of staff at Holywell have spoken to the deputy head about doing something to recognise what Jayden did at the school.”

Ms Hughes added it was a reminder all children should be taught first aid from an early age.