Morgan has a long history of publicly decrying Markle and the final straw came in the wake of the bombshell interview Markle and Prince Harry did with Oprah Winfrey. Morgan called Markle a "liar", stating that he did not believe any of the claims she made during the interview, including her claims that she suffered from mental health problems.
A short time after Morgan dramatically stormed off set, the GMB network ITV, received more than 50,000 complaints about Morgan's statements on air, including an official complaint from Markle herself.
ITV later confirmed that Morgan had resigned, with reports later emerging that he had been asked to apologise to Markle, but had refused, choosing to resign instead.
Since then, Morgan has steadfastly defended his comments, claiming he is making a stand to defend "freedom of speech" and is a victim of "cancel culture".
Morgan has also used Twitter to continue berating the Duke and Duchess of Sussex over their Oprah tell-all, calling on Britain to "stand up for our Queen".
The future of Good Morning Britain could be in jeopardy after Morgan's departure with figures showing a 40 per cent drop in audience as a result. There are also several petitions doing the rounds on social media, campaigning for Morgan's return to GMB, although the effort seems to be a futile one with Morgan commenting on Twitter that the support was a "pleasant surprise", but he definitely will not be returning to GMB.