But Brussels has warned the MoU will not automatically lead to the UK’s lucrative financial industry being able to sell a wide range of products and services to EU clients again.
Alan Sked, an international history professor at the London School of Economics, has advised Mr Johnson to give up on the negotiations with the EU and focus on broadening Brexit Britain’s horizons throughout the lucrative Asian markets.
He tweeted: “The Government should give up negotiating a financial deal with the EU and concentrate on expanding its influence in Asia.
“The EU is in decline. Let it go.”
The new row erupting over the MoU is likely to further intensify tensions between the UK and EU, with one City of London official describing the framework as a “talking shop”.
Simon Morris, a financial services partner at law firm CMS, sad: “This is unlikely to offer solid foundations for bulk cross border business.”
In January, London was dealt a huge blow after it was revealed six billion euros in daily share trading had already disappeared to Amsterdam, along with large volumes of trading in derivatives.
However, he warned: “But it still feels as though the UK needs to continue to plough its own furrow in case there is a change of heart.”
Jonathan Hill, a former EU financial services commissioner, urged Britain should not wait for access or equivalence to be granted, but instead concentrate on building London up to be more appealing to international investors.
Daniel Pinto, chief executive of Stanhope Capital, also said: “Achieving a form of equivalence with the EU is essential but it should not detract us from the real challenge: making London and other financial capitals in Europe more competitive relative to the fast-growing US and Asian markets.”