Migrants make up 10.9 percent of the country's total workforce | Daniel Leal-Olivas/AFP via Getty Images High cost for UK if migrants stopped work for 1 day: study British GDP would fall 4 percent if migrants all took a day off, research shows.

The British economy would suffer a £328 million hit if migrants stopped working for one day, according to research by a think tank published Monday.

The study by the New Economics Foundation found that the health service and other parts of the economy would be unable to function if all migrant workers — which make up 10.9 percent of the country's total workforce — stopped working for the day. It also found that U.K. GDP would fall by 4 percent as a result of such a stoppage.

Migrants make up 31 percent of cleaning and household staff, 30 percent of food preparation and hospitality workers and 26 percent of health professionals.

“Our future as a country depends on the economic, cultural and social contribution that migrants make," said Marc Stears, chief executive of the New Economics Foundation.

The study comes as members of the House of Lords begin debating the Article 50 bill, with peers to discuss the rights of 3 million EU citizens in the U.K. after it leaves the bloc.