A convicted acid attack killer has had his sentence extended to life with a minimum of 14 years after being found guilty of attacking a prison officer.

Xeneral Webster, who had been jailed after he hurled sulphuric acid at an innocent nurse in High Wycombe, attacked prison officers while behind bars earlier this month. 

He was found guilty of using a corrosive fluid with intent, causing GBH with intent, administering poison and assault by beating at Oxford Crown Court today.

Mr Webster previously doused an innocent mother who was "in the wrong place at the wrong time” just weeks before he killed a nurse in High Wycombe with industrial strength sulphuric acid.

Xeneral Webster hurled the noxious substance in a Vue cinema in west London on March 8, 2017, a jury heard, where it landed on Neetta Vaidhya, melting her sock and burning her feet.

She thought she had been hit by hot coffee when she first felt a burning sensation in her hands and feet until she saw her blue sock melting before her eyes and realised the substance was something else.

Imiuru had been intending to hurl his acid at another man during an argument - in circumstances similar to those just under three months later which led to him becoming Britain’s first convicted acid killer.

More to follow.