British Prime Minister Boris Johnson said he was nervous about his narrowing lead in opinion polls ahead of Thursday's election but pledged to deliver a "transformative" Brexit on January 31 that would allow lower immigration.
"Brexit is the most radical and profound change to the management of this country," Johnson said, adding he would lead the United Kingdom out of the European Union on January 31 if he won a majority.
"Brexit is indispensable - you can't move forward without Brexit," added the Conservative Party leader who won the top job in July after Theresa May failed to deliver Brexit on time.
Opinion polls show Johnson leads Labour Party leader Jeremy Corbyn, though the lead has narrowed in recent weeks.
Asked if he was nervous about narrowing polls, Johnson said: "Of course, we are fighting for every vote. I think that this is a critical moment for this country."
Four opinion polls published on Saturday put the lead of Johnson's Conservative Party over the Labour Party at between eight and 15 points.