The former Spokesman for the Labour Party briefly took over from Piers, presenting alongside Susanna Reid for Mental Health Awareness Week.
However, despite his exit from the show two months earlier, Piers has clearly been keeping a keen eye on the ratings.
‘Alastair Campbell’s in a permanent state of mouth-frothing, spleen-desecrating rage about Boris Johnson’s uncomfortable relationship with the truth,’ the 56-year-old wrote in his Mail Online column.
‘So it’s been amusing to see him boast on Twitter about his tremendous ratings success while briefly presenting from my old chair on Good Morning Britain.’
Piers went on: ‘On his first day, only 630,000 viewers tuned in, a pitiful 18 per cent share of the total breakfast TV audience. (By comparison, on my last day, 1.3 million were watching, a 35 per cent share.)
‘It appears that for all his Boris-like bluster, poor Al is a fork-tongued Weapon of Mass Ratings Destruction.’
However, Alastair, 64, has previously given as good as he’s got, branding Piers ‘obsessed with ratings and media coverage’ in his own column for The New European.
It’s not the first time Piers and Alastair have clashed, after the former Downing Street Press Secretary made quite the blunder on air, accidentally announcing the death of the Queen, after mistaking her for Prince Philip, who died in April.
He then joked: ‘Ironically, this worst gaffe in breakfast show history may have killed off hapless Al’s scheming aspirations to be the new me. I’d give him a consoling hug, if it was allowed.’
Piers quit GMB in March this year, after receiving a record number of Ofcom complaints about his comments on Meghan Markle.
After a clash with his co-star Alex Beresford, he stormed off set, a move which he has since admitted he regrets.
Metro.co.uk has contacted reps for Alastair Campbell for comment.
Good Morning Britain airs weekdays at 6am on ITV.
If you’ve got a celebrity story, video or pictures get in touch with the Metro.co.uk entertainment team by emailing us email@example.com, calling 020 3615 2145 or by visiting our Submit Stuff page – we’d love to hear from you.
For more stories like this, check ourentertainment page.
Follow Metro.co.uk Entertainment on Twitter and Facebook for the latest celeb and entertainment updates.You can now also get Metro.co.uk articles sent straight to your device. Sign up for our daily push alerts here.
MORE : Piers Morgan thinks he’s ‘never been more popular’ than after Meghan Markle row and reckons she celebrated him quitting GMB
MORE : Piers Morgan and Simon Cowell talking about ‘a few opportunities’ as ex-GMB host addresses TV future
Thanks for reading the whole article. If you wish to get an daily update about Piers Morgan takes aim at Alastair Campbell’s ‘pitiful’ GMB ratings , click on the bell button to subscribe for the notifications.