Boris Johnson's Conservative Party extended its lead over the opposition Labour Party to 11 points this week, according to an opinion poll published by Savanta ComRes for the Telegraph newspaper on Wednesday.
Ahead of Britain's election in just over three weeks' time, support for the Conservatives stood at 42%, up one point from the last poll published on Saturday, while Labour was down two points at 31%.
Support for the pro-European Union Liberal Democrats rose to 15%, up one point, while the Brexit Party was unchanged at 5%.
Savanta ComRes interviewed 2,035 British adults between Nov. 18 and 19.
In other news. Labour leader Jeremy Corbyn will unveil his opposition party's election manifesto on Thursday, setting out how in government he plans to transform Britain with "the most radical and ambitious plan" in decades.
With three weeks before Britain votes in its second election in just over two years, Corbyn will press his message that only Labour can challenge the status quo, fighting for ordinary people against "bankers, billionaires and the establishment".
Lagging in the polls, the 70-year-old socialist will hope his message of change will drown out criticism of his Brexit stance, which even some in his party say lacks the clarity of Prime Minister Boris Johnson's vow to "get Brexit done".
Both parties have promised to end economic austerity and relax the purse strings for stretched public services before the Dec. 12 election, which will determine how, when and even whether Britain's departure from the European Union happens.
Trying to combat criticism from Johnson's Conservative Party over Labour's spending plans, Corbyn will say how he plans to pay for his manifesto, which includes scrapping university fees, reducing the working week and nationalising utilities.
"This is a manifesto of hope. A manifesto that will bring real change. A manifesto full of popular policies that the political establishment has blocked for a generation," Corbyn will say, according to excerpts of his speech.
"Those policies are fully costed, with no tax increases for 95% of taxpayers."