The ITV host, 61, did not hold back at former Polish foreign minister Radosław Sikorski as they locked horns in the interview, which also included Nigel Farage.
“Why does it bother you that [Farage’s] just said – and a lot of people have said – that we can get good trade deals with other countries? You almost wince,” Madeley asked as he grilled him.
Sikorski, 54, responded: “Because other countries have made it clear that they cannot negotiate with Britain until they have left the EU.
“If Britain is out of the EU customs area, then Britain can negotiate with them. But then you have a hard border in Ireland – that’s a big problem.”
However, the presenter was unimpressed with the answer and lashed out: “Let’s come onto that separately. The impression I’m getting from you is that you’re part of a movement which wants to see us suffer a bit, that wants to punish us.”
“No, just like regaining control is the first preference for Britain. We respect that. For us, the first preference is to keep the EU and therefore Britain cannot be seen to have a better deal than non-members. Members should have privilege,” Sikorski hit back.
Farage, 53, was also not pleased and told him: “It’s a subservient relationship.”
The exchange comes as Farage warned that the Brexit negotiations were “completely deadlocked” and warned Prime Minister Theresa May against appeasing European Union leaders.
He explained: “We’re deadlocked completely and Theresa May made a series of concessions and what the EU did was say, ’Thank you very much, we’d like some more.’
“Appeasing Michel Barnier and Jean-Claude Juncker is never going to work. If there is one person – and I’m trying to be positive here – who can break the deadlock is Merkel. After all, she is the most powerful.”
Farage added: “Ultimately, we made a global decision. It’s up to the PM to make sure that happens.”
Good Morning Britain airs weekdays on ITV at 6am.