In a speech billed as the most important of her premiership, Mrs May set out plans on Friday for a two-year "implementation period" after Britain officially leaves in March 2019 - before moving to a permanent trade deal.
However, the analyst criticized May's response to the EU's demands for a hefty divorce bill, saying the fact that she agreed London had to pay anything at all was going to cause problems for the UK.
"Our task is to find a new framework that allows for a close economic partnership but holds those rights and obligations in a new and different balance", she said.
"The speech shows a willingness to move forward, as time is of the essence", he said.
"Ireland is fully behind the EU's Chief Negotiator Michel Barnier and the common mandate that he has from the 27 EU Member States".
France's president, Emmanuel Macron, said that while he welcomed May's "willingness" to move forward, more progress was needed on the rights of European Union citizens in Britain and the border with Ireland as well as the so-called "divorce settlement".
Britain will continue to pay into the European Union for years after Brexit, May indicated.
In the first part of her speech, the PM acknowledged that "for many this is an exciting time full of promise, for others it is a worrying one" but said she felt "optimistic" about the future.
"Our determination to defend the stability, security and prosperity of our European neighbors and friends remains steadfast", she said.
Paris, Sep. 23 (IANS): The UK must provide more clarity about its negotiating position on Brexit, French President Emmanuel Macron has said following British Prime Minister Theresa May's speech in the Italian city of Florence.
Mrs May briefed her top team at a marathon two and a half hour cabinet meeting in Downing Street on Thursday on what she will say in Florence.
"If we were to fail, or be divided, the only beneficiaries would be those who reject our values and oppose our interests".
Ravens also jokes: "I'm told some of the artefacts in the Uffizi gallery are nearly as ancient as Jacob Rees‐Mogg's world view", while apologising to Boris Johnson for not making this her resignation speech.
One potential benefit from a transition period may be that it lets Britain present its voters with a somewhat less hefty bill for leaving than the 60 billion euros ($70 billion) or so that Brussels reckons it would owe the European Union come March 2019.