FILE - In this Wednesday, June 13, 2018 file photo, Britain's Prime Minister Theresa May leaves 10 Downing Street to attend the weekly session of PMQs at parliament in London. The British government is facing another knife-edge vote in Parliament on Wednesday June 20, 2018, over how much control lawmakers should have over the country's departure from the European Union. (AP Photo/Kirsty Wigglesworth, File)