A “respected and popular” police officer who was struck by a train while trying to rescue a man in distress on the tracks has died.

Sergeant Graham Saville was seriously injured last Thursday as he responded to concerns for a man’s safety in Balderton, near Newark-on-Trent.

Chief Constable Kate Meynell, of Nottinghamshire Police, said: “Today is a day of mourning for the entire police family.

“Graham was a hugely respected and popular colleague and his death in the line of duty has come as an enormous shock to us all.

“Our hearts and deepest condolences go out to his family and we will do everything we can to support them through this unimaginably devastating time.”

This is a breaking story. More to follow.