A drunk who fatally attacked his own grandfather is filmed glassing a patron in a nearby working men's club less than an hour later – after the victim had confronted the killer for boasting about what he had done.

The shocking footage of Jakob Walpole attacking drinker Dennis Hopton from behind was released by police as the 33-year-old was convicted of the manslaughter of his grandfather John Brown, a 'world-renowned' Jaguar restoration expert, after an all-day drinking session.

Violent Walpole, who is also seen on CCTV footage arriving at Mr Brown's bungalow moments before he 'set about' the 81-year-old inside the property, was also convicted of the glass attack on Mr Hopton and assaulting a third man who had escorted him out of Bulkington Men's Club in Warwickshire after witnessing the glassing.

Walpole, who lived in the village in a property owned by Mr Brown and his 'bedbound' wife Dorothy, will be sentenced on Monday.

Jurors heard Mr Brown was well known in the village for running the local Leaping Cats workshop repairing vintage cars, but had recently been diagnosed with dementia.