Britainβs election campaign heated up Sunday even before it officially started, with Prime Minister Boris Johnson saying he would apologize to Conservatives for failing to take the U.K. out of the European Union by Oct. 31 and Brexit Party leader Nigel Farage saying he wonβt personally run for a seat in Parliament. Johnsonβs promise to have Britain leave the bloc by Oct. 31 had been his central platform in the party leadership competition that brought him to power in July. He told Sky News on Sunday that it was a matter of βdeep regretβ that he failed to do so. Asked if he was sorry about missing the deadline, Johnson said: βYes, absolutely.β Johnsonβs plan to leave by Oct. 31 with or without a divorce deal was blocked by Parliament, which required him to seek a Brexit extension. The EU has granted a three-month Brexit extension until Jan. 31. Johnson pushed hard for an early national election on Dec. 12 in which he hopes to get a more Brexit-friendly Parliament. One...