The UK has officially asked Georgia to extradite Jack Shepherd, who was convicted of killing Charlotte Brown during a speedboat trip in 2015.

The 31-year-old is currently in prison in Tbilisi.

A spokesperson for the Crown Prosecution Service said the organisation prepared a request for extradition which was sent to Georgian authorities by the Home Office.

It remains unclear when the request was officially submitted.

The web designer took Ms Brown on a speedboat in the Thames during their first date in December 2015.

In pictures: Speedboat killer Jack Shepherd Show all 10 1 /10 In pictures: Speedboat killer Jack Shepherd In pictures: Speedboat killer Jack Shepherd Jack Shepherd, who went on the run in March 2018 after killing a woman in a speedboat crash on the River Thames, attends court hearing in Tbilisi, Georgia, 29 January, 2019. Reuters/Irakli Gedenidze In pictures: Speedboat killer Jack Shepherd Charlotte Brown, 24, who died in a speedboat crash on the River Thames in December 2015. PA In pictures: Speedboat killer Jack Shepherd Undated photo issued by the Metropolitan Police of the speedboat owned by Jack Shepherd who was found guilty of killing his date, Charlotte Brown, in an accident on the River Thames in December 2015. Metropolitan Police In pictures: Speedboat killer Jack Shepherd The family of Charlotte Brown - father Graham Brown, sister Katie and mother Roz Wickens - who died following a speedboat crash, pictured on 22 January, 2019. Yui Mok/PA In pictures: Speedboat killer Jack Shepherd Tariel Kakabadze, the lawyer of Jack Shepherd, attends a court session, in Tbilisi, Georgia, 25 January, 2019. Shakh Aivazov/AP In pictures: Speedboat killer Jack Shepherd Jack Shepherd speaks to media on 23 January, 2019, at the police station in Tbilisi, Georgia, where he handed himself in to police. Still taken from video provided by Rustavi 2. Rustavi 2 via AP In pictures: Speedboat killer Jack Shepherd Jack Shepherd is escorted to a court hearing in Tbilisi, Georgia, 25 January 2019 EPA In pictures: Speedboat killer Jack Shepherd Father of Charlotte Brown, Graham, gives a statement to the media outside Portcullis House following a meeting with Home Secretary Sajid Javid on 22 January, 2019. Jack Taylor/Getty Images In pictures: Speedboat killer Jack Shepherd Metropolitan Police image of Jack Shepherd. Metropolitan Police In pictures: Speedboat killer Jack Shepherd File photo of Jack Shepherd dated 18 October, 2017. Steve Parsons/PA

Ms Brown was killed when the boat overturned, plunging the pair into icy water.

Shepherd then went on the run for 10 months but was convicted of manslaughter in absentia and sentenced to six years in prison.

He handed himself in to Georgian police officers in January 2019.

Shepherd has reportedly written to Ms Brown's family, requesting a meeting "to explain everything that happened that tragic evening".

The note, obtained by The Sun newspaper, read: "I want more than anything to talk to Charlotte's family.

"I wish that I had ignored the police and lawyers and spoken to you three years ago."

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But Ms Brown's father Graham Brown is quoted by the newspaper as saying: "We don't intend to dignify Shepherd's comments with a response until the extradition process has been completed and he is finally held accountable for his actions."