A British supermarket worker once commended for his “outstanding service” killed himself a week after he was fired for leaving his post to chase a shoplifter, according to a new report.

Shaun Winstanley, 49, from Staining near Blackpool, Lancashire, worked as a customer assistant at the Tesco Express chain for 17 years and won several awards, The Mirror reported Monday.

But on Jan. 2, he ran after a shoplifter at the store — an act that the company said put both himself and a customer in danger, according to the report.

The supermarket chain fired Winstanley on Jan. 14 — and despite his attempt to appeal the decision, the company decided to uphold it on Feb. 6, the outlet reported.

He was found dead on Feb. 13, and an investigation determined that he suffocated himself at home, the outlet reported.

Winstanley had a history of mental health issues that escalated in May 2018 — when he was robbed at gunpoint, according to the report. His condition gradually deteriorated, and his firing only made things worse, an investigation into the death revealed.

His heartbroken stepdaughter, Siobhan Winstanley, 28, testified that she wrote to the supermarket chain after her father’s death — only to be told the matter was closed.

“It is very raw and very difficult for us to come to terms with,” Winstanley said, according to the outlet. “He was of the very strong opinion that [suicide] was a selfish thing to do, so obviously it’s not something he would have done lightly, knowing he had children.”

“I am angry at Tesco,” she added. “We have got our father in an urn in our living room. I sit there every morning with my coffee and look at him and wonder maybe if things had been different, he would still be here. I think there needs to be an awareness of mental health and I think employers need to be doing right by their employees.”

A friend became concerned after he didn’t hear from Winstanley for days after his dismissal, the investigation also determined.

The friend visited the home on Feb. 13, only to find the door locked, lights on and his pal’s Bichon Frise dog, Benji, barking. He knocked, but received no response.

An arriving detective, Col. Carl Harris, testified that he found Winstanley’s body on the floor in a lounge area of the home. There were no signs of any injuries, or any disturbance, he said.

Coroner Clare Doherty ruled Winstanley’s death a suicide, according to the report.

“A friend spoke with Mr. Winstanley on Feb. 8 and he expressed thoughts of self-harm,” Doherty said. “It seems to tie in with the fact that he had appealed the loss of his job and he had not been successful in that appeal on that day.”

Tesco is “extremely sad to hear about the death of Mr. Winstanley,” the company said in a statement.

“Unfortunately, we are unable to comment on individual circumstances relating to our colleagues.”