The number of EU nationals working in the UK has registered an annual fall for the first time in eight years, official figures reveal.
There were an estimated 2.29 million overseas employees from the bloc in the first three months of this year.
This was 28,000 fewer than the equivalent period of 2017, and marks the first year-on-year decrease since January to March 2010.
Labour market data released by the Office for National Statistics showed the fall was driven by a steep drop in the number of workers from the eight eastern European countries that joined the EU in 2004.
This was down by 91,000 compared to January-March in 2017, the largest annual decrease since comparable records started in 1997.
Jonathan Portes, professor of Economics at King’s College London, said: “Today’s labour market statistics show a year-on-year fall in the number of European nationals working here, for the first time since the aftermath of the recession.
“A combination of factors – a slowing economy here combined with recovery on the continent, but also the political and psychological impact of the Brexit vote – have made the UK a significantly less attractive place to live and work.”
Lord Green of Deddington, chairman of Migration Watch UK, pointed to figures for EU-born workers, which he said were 155,000 higher than in the same quarter before the referendum.
He said: “These new labour force figures dispose of any claim of a Brexodus.”
Madeleine Sumption, director of the Migration Observatory at the University of Oxford, said: “The employment rate of A8 migrants in the UK is close to record highs, at more than 85%.
“Despite that, the number of A8 migrants working in the UK has declined.
“These figures are consistent with the possibility that there has been net emigration of A8 citizens but don’t show it conclusively – we’ll need a few more months of data to see whether this is a short-term blip or a real trend.
“We do know from other migration figures that over the last couple of years, net migration from A8 countries has fallen proportionally more than it has from the other parts of the EU.
“Exactly why is hard to tell, although it’s not unusual for people from different countries to respond differently to developments like the lower value of the pound or the political perceptions of Brexit.”
The year-on-year dip in EUA8 workers was not mirrored across other groups of member states.
There were 355,000 Romanians and Bulgarians employed in the UK between January and March, up from an estimated 297,000 in the first three months of last year.
It is the second highest figure recorded since restrictions on citizens of the two countries working in Britain were lifted in January 2014.
The number of nationals of 14 long-term EU member states including Germany, Italy, Spain and France also showed a slight increase – but remained at just over one million.
Government officials are working to draw up post-Brexit arrangements which incorporate an end to free movement rules while ensuring that any fall in overseas labour does not damage the economy.
Analysis published last year showed EU migrants account for as many as one in 10 employees in some sectors.
The figures released on Tuesday also show a rise in the number of overseas workers from the rest of the world.
There were 1.25 million non-EU nationals working in the UK in January to March, 20,000 more than a year earlier.
Statisticians say the estimates relate to the number of people in employment and should not be used as a proxy for flows of foreign migrants into the country.