LONDON (Reuters) - British Prime Minister Theresa May apologized on Monday for saying that European Union migrant workers coming to Britain would no longer be able to “jump the queue” after Brexit.

May was challenged by a Scottish National Party lawmaker in the House of Commons over the comment she made last week to business leaders. Philippa Whitford asked May if she would apologize for managing “to insult and upset over 3 million European citizens who live and work in this country”.

“I should not have used that language in that speech,” May said in response. “Right from the very beginning I said that citizens rights was a key issue that I wanted to see addressed in the withdrawal agreement.”