Prime Minister Theresa May is trying to force her Brexit deal through parliament but lawmakers are expected to reject it. If so, business chiefs and investors fear the world’s fifth-largest economy will leave the European Union at 2300 GMT on March 29 without an agreement on their future relationship. May’s government has repeatedly warned that a no deal will lead to severe economic disruption, and Monday’s exercise was part of preparations to ensure essential supplies can keep flowing through Dover, Europe’s busiest ferry port.
