Jo Johnson has announced he is quitting as an education minister and will step down from Parliament, saying he is "torn between family loyalty and the national interest".
The move comes in a frenetic week for the premier, who said his brother had been "a brilliant, talented minister and a fantastic MP", and that the decision would not have been easy.
Almost 60 percent of the newly-registered voters are under the age of 35, giving hope to the Labour Party that the surge in registrations is closely linked to widespread outrage over Johnson's push for the U.K.to leave the European Union by the end of October, with or without a deal.
Opposition lawmakers, supported by Conservative Party rebels, are close to passing a bill that would block a no-deal Brexit on Oct. 31, compelling the prime minister to seek a three-month delay to Britain's departure if no agreement is reached by late October. House of Commons leader Jacob Rees-Mogg told Parliament that a vote would be held Monday on a new motion calling for an election in October.
Labour Party politicians and pro-democracy groups celebrated Wednesday as more than 100,000 people reportedly registered to vote in a 48-hour period this week amid mounting chaos in the United Kingdom government in anticipation of a possible general election in October. They are also concerned that if Mr. Johnson won a majority in an election on October 15 he could revoke the no-deal legislation.
It's also the most vivid example of how Boris Johnson is splitting his Conservative Party.
Pressure continues to build on Johnson after his younger brother, Jo Johnson, spectacularly resigned from Parliament.
Opposition parties say they are in favour of an election in principle, but are debating whether or not to accept Johnson's proposed date. Johnson failed to gain the required two-thirds majority in Wednesday's vote, which came shortly after MPs approved a bill created to force him to seek a further delay to Brexit.
"It clearly turned into a rant about Brexit, the Opposition and a potential general election".
Against the dollar, the pound rose 0.7% to $1.2337, after jumping 1.4% on Wednesday on the sense that the prospect of a "no-deal" exit had receded.
But early Thursday, the Lords agreed to let the bill pass through the chamber by Friday, allowing it to become law on Monday.
Diplomats said an election campaign would halt any Brexit talks with the EU and expressed frustration with the turmoil in British politics at such an important juncture in European history.
Mr Johnson wants a public vote before an European Union summit on Oct 17, which could be the last chance to get a Brexit deal before Britain's scheduled departure on Oct 31.