Piers Morgan should return to the UK to answer ‘some very serious questions’ over allegations of phone hacking, the Culture Committee chairman has said.

Conservative MP John Whittingdale said the former Daily Mirror editor turned US TV star could be quizzed by the Metropolitan Police on the basis of recent evidence.

But he said Morgan would not immediately be called in front of the Commons Culture, Media and Sport Committee, which is investigating phone hacking, because the police inquiry ‘has to be the priority’.

His remarks came after Heather Mills claimed that a senior Mirror Group journalist admitted hacking voicemails left for her by Sir Paul McCartney.

Sir Paul’s former wife told BBC Two’s Newsnight that the journalist made the admission in 2001.

The BBC, which declined to name the journalist allegedly involved, said it was not Morgan, who was editor of the Daily Mirror at the time.

But the message in question appeared to be the same as the one which Morgan later admitted listening to, a spokesman for the programme said.

In a 2006 article in the Daily Mail, Morgan referred to hearing a recorded message which Sir Paul had left for Heather, the spokesman said.

He wrote: “At one stage I was played a tape of a message Paul had left for Heather on her mobile phone.”

Morgan, now a talk show host on CNN and an America’s Got Talent judge, issued a statement describing Heather’s claims as ‘unsubstantiated’.