LONDON: Britain may have to allow European Union migrants to come to the country without restrictions for several years after Brexit because of the scale of the challenge of setting up a new immigration system, a think tank said on Thursday.
The Institute for Government, an independent research body, said it was unfeasible for the government to implement a new system by April 2019, when Britain is due to have left the EU.
"The prime minister has recognised that an ‘implementation phase’ will be required post-Brexit," the institute said in a report. "For immigration, this will require the continuation of free movement, possibly for several years post-Brexit."
Concerns about immigration played a key role in the debate ahead of last year's EU membership referendum, and were the driving force behind many voters opting to support Brexit.
Prime Minister Theresa May has promised she will reduce the numbers of migrants after Brexit, making the issue one of her priorities at the expense of Britain's continued membership of the EU single market.
The Institute for Government said that while Britain would be free to introduce new border controls for EU citizens once it left the bloc, in practice any interim measures introduced while a permanent system was being drawn up would hurt the economy.
"Multiple changes increase the disruption to labour markets and administrative burdens," the report said. "That means free movement will have to continue post-Brexit until the new regime is ready to go live."
Furthermore, the report said the government would need up to 5,000 additional staff to process applications from the roughly 3 million EU nationals who currently live in Britain
Meanwhile Reuters also reported that
Britain's exit from the European Union cannot be turned into a success, but it can be managed in a pragmatic way, a senior European Union official said in an interview with Politico on Wednesday.
Martin Selmayr, who is the head of cabinet for European Commission President Jean-Claude Juncker, also said British Prime Minister Theresa May was an impressive negotiator, which was good fortalks.
"will never become a success, of course, because it is a sad and sorry event, but it can be managed in a professional and pragmatic way," Selmayr said.
"President Juncker said today that she (May) is an impressive woman and a very impressive negotiator. That is very good for negotiations, because we need a very strong negotiator, someone who unites the entire nation behind her," he said.
Also British Prime Minister Theresa May accused European politicians and officials on Wednesday of seeking to affect the outcome of the June 8 national election by issuing threats over.
May, whose Conservative Party has a double-digit lead over the main opposition Labour Party in the polls, has framed the early election as an opportunity to strengthen her hand in upcoming negotiations on Britain's exit from the European Union.
Speaking in front of her Downing Street office after visiting Queen Elizabeth to mark the dissolution of parliament, the formal start of the election campaign, May said there were some in Brussels who did not want to seetalks succeed.
Over the weekend a German newspaper gave a damning account of a dinner last week between May and European Commission President Jean-Claude Juncker, reporting that he had told May thatcould not be a success.
"Britain's negotiating position in Europe has been misrepresented in the continental press, the European Commission's negotiating stance has hardened, threats against Britain have been issued by European politicians and officials," May said. "All of these acts have been deliberately timed to affect the result of the general election."
There was no immediate EU comment on her accusations.
May has dismissed the German newspaper report as Brussels gossip and on Tuesday repeated her promise to be a "bloody difficult woman" in talks with Juncker, as brinkmanship between the two sides increased ahead of the negotiations.
A senior politician from the opposition Labour Party warned May was increasing the chance of not getting a deal by accusing EU politicians of trying to meddle in a British election.
"By picking a needless fight with our European partners in this way, the prime minister is making a good deal with Brussels less likely, and a chaoticwith no agreement at all more likely," Chuka Umunna said in a statement.
But Rupert Harrison, an adviser to former finance minister George Osborne until last year'sreferendum, said the German report had played into May's hands as her team wanted to make the election all about giving her a strong mandate for the talks.
"When Juncker gives Theresa May a pre-election PR gift, does anyone really expect her not to play it for all she can?" he said on Twitter. "They'll hope this story runs and runs."
Earlier on Wednesdayminister David Davis and finance minister Philip Hammond kicked off the formal election campaign with a poster predicting a tax "bombshell" if Labour won and a warning Britain could not risk "unleashing economic chaos" at such an important time for the economy.
A poll by research firm Kantar on Wednesday put the Conservatives on 48 percent, up two percentage points on a week earlier, while support for Labour was unchanged at 24 percent.
May said reaching the bestdeal with Brussels would be the overriding task for whoever wins the June 8 election and urged voters to give her their backing to "fight for Britain".
She said that while Britain wanted to reach a deal with the EU, that view was not shared by everyone in Brussels.
"The events of the last few days have shown that, whatever our wishes, and however reasonable the positions of Europe's other leaders - there are some in Brussels who do not want these talks to succeed. Who do not want Britain to prosper."