Throughout Piers' stint hosting Good Morning Britain, he was embroiled in a feud with his BBC Breakfast counterpart.
The two presenters engaged in a five-year war of words over Good Morning Britain’s viewing figures.
Charlie Stayt raised eyebrows last week when he commented about the size of an MP's flag.
“I think it’s just a little bit small, but that’s your department really.”
The two daytime stars have held a long-standing rivalry since Piers joined Good Morning Britain in 2015.
"I hope my boss would have dragged me off set".
"When coming on to give an expert opinion, titles matter."
"You’ve got to blag it sometimes in life," the Packed Lunch host said.
Absolute state of it.
The Apprentice star told the BBC Breakfast presenter to "mind your own bloody business" after he had another pop at the GMB host.
About BBC Breakfast
'BBC Breakfast' is corporation's early morning news and current affairs programme that airs daily from 6am on BBC One and BBC News, broadcast live from Salford Quays in Manchester. It is currently hosted by a team of presenters including Louise Minchin, Dan Walker, Charlie Stayt and Naga Munchetty, as well as stand-in hosts Mike Bushell and Steph McGovern. Carol Kirkwood acts as the show's resident weather presenter, hosting her segments from BBC Broadcasting House in London. Many of journalism's biggest names have presented the show over the years, including Bill Turnbull, Susanna Reid, Natasha Kaplinsky, Sophie Raworth, Dermot Murnaghan and Sian Williams. The show attracts an average daily audience of 1.5m, which is around double that of ITV rival 'Good Morning Britain', which is fronted by 'Breakfast' alumni Susanna Reid, along with Piers Morgan and Ben Shephard.