Bournemouth, UK. 15 September, 2019. Jo Swinson, Leader of the Liberal Democrats, listens to speakers on the Stop Brexit motion during the Liberal Democrat Autumn Conference. Following a vote won by an overwhelming majority, the Liberal Democrats pledged to cancel Brexit if they win power at the next general election. This marks a shift in policy from their previous backing for a People's Vote. Credit: Mark Kerrison/Alamy Live News