I can't remember where I read about his boasting - probably
Private Eye magazine (not online). Guido Fawkes is not saying anything new here.
On edit: Here's the piece I saw - someone else put it online (from Private Eye 1281, 4 Feb 2011)
Screws hacks have been chuckling over the hysterical TV interviews and Tweets in which two previous editors, Phil Hall and Piers “Morgan” Moron, try to defend Andy Coulson and accuse the Guardian of running a “witch-hunt.” What might be revealed by close scrutiny of their own records? Any exposure of dubious methods wouldn’t exactly help their new careers. Hall has gone from poacher to gatekeeper, with a new career as a celebrity PR, and has already been embarrassed by his nephew, a Screws hack in the Coulson era, admitting that he transcribed hacked messages for sleazy Neville Thurlbeck, then as now the paper’s chief reporter.
Moron, meanwhile, is enjoying the limelight as a celeb interviewer on cable TV. Former Mirror hacks have this week been reminiscing about the occasion when Moron serenaded their newsroom with the Beatles song “And I Love Her” during a period of pre-wedding froideur between Paul McCartney and Heather Mills, and then informed them that “It’s the message he sang to Heather to make it up — you should hear the tape.”
http://www.matthewcharlesdavis.com/2011/02/14/you-should-hear-the-tape/And in Private Eye 1283, 4 March 2011, Private Eye talked about hacking, the Mirror, the NotW, and the Jonsson/Eriksson affair:
Lawyers for the former England football manager Sven-Goran Eriksson, who was turned over by the tabloids for his affairs with Ulrika Jonsson and Faria Alam, have asked Scotland Yard if his name and mobile phone details appear in the stash of documents seized from the jailed News of the World snooper Glenn Mulcaire.
The Mirror won Scoop of the Year at the 2003 British Press Awards for revealing Sven's fling with Ulrika, but even at the time there were questions about where the story had come from. For one thing, it was credited to the 3am Girls, who duly collected the prize, even though it was showbiz hack James Scott who received the tip-off. For another, the then Screws editrix Rebekah Wade had been staking out Ulrika for days and planned to devote her first eight pages to the affair until Piers Moron's Mirror beat her to it.
Rebekah set up an internal investigation to discover if (as she suspected) a disgruntle Screws hack had leaked the story to the Mirror, but it was inconclusive. There was, however, no investigation into the original provenance of the Screws' information. Another case for Inspector Knacker, perhaps?