A tsunami of uncertainty has engulfed Anna Woydyla, a Polish restaurant worker in London, since Britain voted to leave the European Union.

Would her two teenage children, who grew up in the United Kingdom, still qualify for loans to study at British universities? Would she and her husband, after 11 years of working here, have to sell the home they just bought? Leave their jobs? Leave their new country? Try to apply for citizenship?

The 41-year-old is among hundreds of thousands of European Union workers in Britain who are fearful and confused over what happens next as their adoptive country begins the long process of unwinding its many ties to continental Europe.