A man given a 17-year jail term after admitting the first acid killing in the UK has failed in an appeal bid.

Xeneral Webster, now 21 and from Westway, west London, admitted manslaughter following the death of mother-of-three Joanne Rand, 47, in Frogmoor, High Wycombe, three years ago.

Webster on Friday asked three appeal judges to allow him to challenge his conviction.

He said he had admitted manslaughter after being given incorrect legal advice.

But Lady Justice Carr, Mr Justice Sweeney and Judge Richard Marks dismissed his bid, at a Court of Appeal hearing in London, and said he had wasted court time and resources.

They imposed a 56-day "loss of time" order.

The order effective delays Webster's release date and means that time he spent in jail waiting for a decision on his appeal bid will not be counted as part of his sentence.

Webster did not appear at the appeal hearing and was not represented by lawyers.

Appeal judges considered a written application.

Webster was jailed in July 2018 after pleading guilty to Marlow nurse Ms Rand's manslaughter part way through a trial at Reading Crown Court.

Ms Rand, a carer who worked with dementia sufferers, was splashed with acid in June 2017 as she sat on a bench in the town centre after visiting her daughter's grave, the trial was told.

Webster had travelled to High Wycombe, armed with the bottle of acid, to meet a man in connection with a drug deal, the trial heard.

He had encountered a man on a bike and tried to steal it.

There had been a tussle, Webster had produced the acid, the bottle had been kicked from his hand and the contents splashed on to Ms Rand, who was sitting nearby.

Ms Rand had been left with five per cent burns and died 11 days later after contracting septicaemia and suffering multiple organ failure.

Judge Angela Morris handed down a 17-year sentence and imposed an extended licence period of three years.

The judge said Webster "bore the responsibility" for Ms Rand's "tragic" death and added: "The fact remains, you had this substance with you in a public place and you cannot have failed to realise the significant harm its contents would have caused to others had it been released."

She said the "cost" of his actions was "incalculable and irreparable" for Ms Rand's family and friends.

Webster also admitted possessing an offensive weapon - a bottle of sulphuric acid - and affray during the incident in High Wycombe.

He also admitted a number of offences relating to a separate incident - possessing an offensive weapon - a samurai sword and ammonia, criminal damage, and making threats to kill.

Judge Morris heard that Webster had previously been attacked with acid, and left with permanent scarring.