The snap election had been called by Johnson in a bid to win a majority for his Conservative Party and get his Brexit deal through Parliament.
A total of 3,322 candidates are standing across the 650 seats in the House of Commons this year
Investors were also focusing on whether US President Donald Trump will impose tariffs on nearly $160 billion worth of Chinese consumer goods from December 15.
This is comfortably over the magic 326-figure required for a majority in the 650-member House of Commons, but the figure remains within the margin that could well throw up a hung Parliament.
YouGov said the uncertainty around the model was such that it was possible no party would win an overall majority
According to bookies Betfair, a Tory majority is leading at a two to five margin, with a hung Parliament projection at three is to one
There were some signs that Jeremy Corbyn's opposition Labour Party was closing the gap, but not by enough yet to keep the Conservatives out of power.
British Indians have played a vital role in helping the Conservatives win elections in the past, says Johnson
Speaking on condition of anonymity, five senior figures drawn from the two biggest parties said Johnson's campaign promise to "get Brexit done" is winning ground in Labour heartlands
However simplistic or misleading, Johnson's message may prove too appealing to an electorate that's tired of Brexit, and wary of what Corbyn is selling
Boris Johnson met PM Narendra Modi on the sidelines of G7 summit in Biarritz, France, last month
Johnson had played up his personal relationship with Prime Minister Modi as he promised to deliver a 'truly special UK-India relationship'
Prime Minister Boris Johnson said on Saturday there were probably about 74 people with terror convictions who had been released on licence
The 2017 attack focused attention on cuts to policing since the governing Conservatives took power in 2010.
At a news conference, Johnson claimed Brexit had been "delayed, diluted, denied" by obstructive politicians.
As far as Europe is concerned, a credible hypothesis is that racism in sport mirrors the growth of right-wing tendencies in society as a whole, which in turn produces right-wing regimes
Johnson called for people to vote for a majority Conservative Party government on December 12 to get Brexit done by the January 31, 2020 deadline
Political leaders in the UK are in campaign mode trying to win over as many voters as they can for next month's general election
Boris Johnson's Get Brexit Done manifesto seeks stronger ties with India
By Aditi Khanna
(Eds: Updating with more details)
London, Nov 24
'We will continue to be open to the world that is subject to democratic control,' said the UK PM