Kate and Gerry McCann's spokesman Clarence Mitchell is to be interviewed a second time by police investigating alleged phone hacking by journalists.

Mr Mitchell says it is possible he was a victim of illegal attempts to access his mobile phone messages during the height of the case involving the McCanns' missing daughter, Madeleine.

He has already spoken once to detectives before allegations that reporters from the News of the World hacked into several phone accounts, including that of murdered schoolgirl Millie Dowler, emerged this week.

Mr Mitchell discovered suspicious activity on his account in February and July, 2008, after asking Vodafone to examine his records late last year.

He said there was no indication that the phone accounts of the McCanns, from Rothley, had been hacked.

He said: "There has been no suspicion that they have been affected though something may emerge in the future.

"I have already spoken to officers in relation to my account to this and expect to do so in the near future.

"I am not pointing the finger at anyone, but at the time the story was front page fodder so it is possible journalists were involved.

"We were not naive. At that time, we knew it was a possibility that this was going on so we were always careful about what we said in messages.

"If, and it is an if, my phone was hacked, then it is a breach of my privacy and potentially something that could have had a harmful affect on the search for Madeleine.

"It that proves to be the case I will look at taking this down legal channels as other victims have."

Prime Minister David Cameron has promised a public inquiry into the affair once the police inquiry is complete.