The Liberal Democrats gain the Brecon and Radnorshire seat from the Conservatives. This marks the first time a seat has changed hands in a by-election triggered by a successful recall petition. The working majority of the Conservative government is reduced to one.
Conservative Party backbencher Jacob Rees-Mogg, with the backing of at least a dozen Tory MPs, says he will submit a letter to the chair of the 1922 Committee, Graham Brady, to trigger a motion of no confidence against Prime Minister Theresa May.
Polls open in the United Kingdom, with Labour leader Jeremy Corbyn and incumbent Theresa May of the Conservatives battling in a tight race, according to final opinion polling, to become prime minister.