Sir Cliff Richard sex abuse investigation involves more than one allegation South Yorkshire's Chief Constable David Crompton reveals investigation into Sir Cliff Richard increases 'significantly' after man claims he had been molested by star

The sex abuse investigation into Sir Cliff Richard has “increased significantly since its inception” and now involves more than one allegation, South Yorkshire Police have revealed.

The 73-year-old entertainer was questioned by police last Augustafter a man came forward and claimed he had been molested by the star in the 1980s.

But in a letter to Keith Vaz, the chairman of the Home Affairs Select Committee, David Crompton, the Chief Constable of South Yorkshire, confirmed that the investigation had now expanded beyond that single allegation.

^{Sir Cliff shortly after the allegations emerged last year (Paul Grover/The Telegraph)}

Responding to a request from Mr Vaz for an update into the progress of the investigation, Mr Crompton said: “This is an investigation which has increased significantly in size since its inception.

"Sir Cliff Richard’s lawyers are aware that there is more than one allegation.”

He added: “In view of the expanding nature of the investigation, it would be premature and potentially misleading to predict a likely date when it will be concluded, however we are progressing as swiftly as possible.”

In a statement released on Wednesday afternoon, Sir Cliff said: "I have no idea where these absurd and untrue allegations come from. The police have not disclosed details to me.

"I have never, in my life, assaulted anyone and I remain confident that the truth will prevail. I have cooperated fully with the police, and will, of course, continue to do so.

"Beyond stating that the allegations are completely false, it would not be appropriate for me to say anything further until the investigation has concluded, which I hope will be very soon. In the meantime, I would, again, like to thank everyone for supporting me through this unbelievably difficult period."