A senior police officer working on the Ben Needham case in Kos has been summoned back to the UK after claims some of the team went on an eight-hour drinking session.

South Yorkshire Police are investigating a report in The Sun that officers spent the evening drinking hours after launching a £1m mission to solve Ben's disappearance.

The toddler went missing while on holiday with his mum and grandma on the Greek island in 1991.

Over the years there have been a number of sightings of Ben - who would now be 26 - but what happened to the youngster remains a mystery.

South Yorkshire Police have put up a £10,000 reward for in return for information leading to his whereabouts.

Before the team of ten officers went out there, Ben's mother Kerry Needham said she had "every faith" in the force and described the detectives as "amazing".

Detective Superintendent Matt Fenwick, one of the officers in charge in Kos, told The Sun last night the team were "working really hard".

He added: "We were up at seven this morning and we've got officers still out now (at 8.30pm) interviewing people. What I can say is that no public money was spent on alcohol."

A South Yorkshire Police spokeswoman said: "Following concerns raised regarding the behaviour of some of those involved, the senior officer has been recalled to the UK with immediate effect to provide the details of exactly what has happened. An internal investigation will follow."