British Prime Minister Theresa May will mark the one-year countdown to Brexit with a fast-paced national tour, aiming to unite the United Kingdom's four nations. On Thursday, May will take in Scotland, England, Northern Ireland and Wales in a day to rally support. There have been tensions between the devolved governments and London over May's handling of Brexit negotiations. But she remains positive. Ahead of the trip, May said she was determined that the UK's future after Brexit will be a bright one.