New mum Jo Paine experienced every parent’s nightmare before Christmas when two-month-old baby Harrison stopped breathing.

Already premature, having been born at just 26 weeks, Jo desperately tried to do CPR while calling 999.

But when the ambulance was slow to arrive she ran outside and thankfully bumped into PC Steve Norton.

PC Norton grabbed little Harrison and ran to Wandsworth Hospital in south west London, which was within sight.

He told Good Morning Britain: “Jo just handed him to me and said ‘I don’t know what else to do’ and I grabbed him and ran.

“I just thought if he was my son I’d want to get him help as quickly as possible.”

Jo said Steve had now become a friend as she handed him a keyring from her and Harrison engraved with the words “forever thankful”.

She added: “There’s no words that can describe my gratitude for what he did. It was incredible.

“And I would say to new mums, take a CPR course, it really is worth it.”