Boris Johnson, Jeremy Corbyn and Jo Swinson will all attempt to woo the UK’s business leaders with speeches to the CBI’s annual conference later.
Mr Johnson will vow to end Brexit “uncertainty” and unveil Tory plans to cut business rates if he is returned to power in next month’s general election.
Mr Corbyn will set out Labour’s plans for 320,000 apprenticeships in England.
And Ms Swinson will say the Lib Dems are the “natural party of business” because they want to cancel Brexit.
Mr Johnson is hoping to win a majority on 12 December, get his Brexit deal taking the UK out of the EU into law by 31 January and begin talks with Brussels on a permanent trading relationship.
The Tory leader is expected to tell the Confederation of British Industry’s conference: “Big business didn’t want Brexit. You made that clear in 2016 and this body said it louder than any other.
“But what is also clear is that what you want now – and have wanted for some time – is certainty.”
The Conservative leader will announce policies to help businesses “make the most of Brexit”,