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Bruce Dickinson attacked the proposed plans and said he was worried about EU “deputies” with no “national allegiance”. Appearing on Newsnight in a flight simulator, Mr Dickinson said: “I don’t think the answer is, as Macron suggests, to have an EU Parliament which is not answerable to anybody and to have a whole load of deputies who don’t have any national allegiance. “Wow, wow, what a good time to get out.”

BBC - GETTY The Iron Maiden singer said that divorce proceedings "are always messy"

Mr Dickinson, a pilot who now runs an aviation business, compared Brexit to divorce proceedings and was not surprised that talks had been difficult. He added: “The opportunities are still there. The process, I don’t have a clue. “It could be that someone has a handle on it, but this is a divorce proceeding and divorce proceedings are always messy.”

His comments come as the Organisation for Economic Co-operation and Development (OECD) yesterday said that Britain would see an “immediate boost” if it reversed Brexit. It also said that Brexit would “stifle growth for years to come” and suggested a second referendum would be "positive". But, the organisation’s own forecast suggests that even in the “least favourable scenario” of the UK leaving without a deal, the UK will grow by one per cent next year.

Pro-EU People's March in pictures Mon, September 11, 2017 Thousands of anti-Brexit campaigners take part in the People’s March for Europe pro-EU rally. Play slideshow REUTERS 1 of 29 Model Joanna Krupa poses during a protest against animals in circuses as an anti-Brexit protester walks past waving European Union flags in front of the Houses of Parliament in London

The OECD warned Britain's economic prospects could be further hit by a "disorderly Brexit" if negotiations between the EU and UK are cut short, triggering a sharp reaction by financial markets. They said this would send the exchange rate to new lows and lead to a downgrade in the UK's sovereign rating. Their new report warned: “Business investment would seize up, and heightened price pressures would choke off private consumption.

GETTY Bruce Dickenson believes that the "opportunities are there"

Brussels is threatening a massive raid on London by demanding “clearing houses” for the euro’s move to the Continent. Global clearing is when financial trades are carried out through a third party. London has been the centre for clearing since the G20 demanded better financial regulation in 2009.

GETTY The Iron Maiden singer blasted Macron for wanting an EU Parliament