Robert said: "He just asked them to turn the music down."

He said his father turned around to come back down off the stage when he was pushed, and that resulted in a broken hip.

"[That's] the most upsetting part. He wasn't going to live forever but it's not a nice way, obviously in pain," he said.

"We want to see justice, of course.

"They must have known he was an old man. It makes you wonder what the world is coming to.

"It has obviously made it difficult. It would've been nice if he'd gone quietly in his sleep.

"He was in hospital, suffering, for a week-and-a-half. It's not nice.

"I feel sad - even though he could be difficult because of his age and dementia, still, you get used to him being around," he said.

Robert, a retired civil engineer, said his father used to visit the Crow's Nest.

"What happened is not nice. The pub has changed a lot over the years. It has become a youngsters' pub," he said.

Robert said he grew up in the home in the the Llanyrafon neighbourhood where his father had lived since 1960.

He said his dad had a career as a design draughtsman and had lived alone since his wife died 40 years ago.

"Me and my brother would visit our father regularly, and clean the house and buy him food.

"His eyesight had deteriorated and he had been diagnosed with dementia two or three years ago."

Robert said: "He's well-known around here, although a lot of his generation are gone," he added.

He said his father would visit the pub two or three times a week, where he would drink beers, and described how he became a familiar face to some locals.

"I suppose he became a pub character," he added.