Supporters of both sides of the Scotland referendum are mounting a final push as a poll suggests the Yes campaign has taken the lead 10 days before the poll.
David Cameron, who spent the weekend with the Queen at Balmoral, will attempt to win over people in Scotland by promising more autonomy if Scotland votes against independence.
Labour leader Ed Miliband is expected to join his predecessor Gordon Brown as he pledges that extra powers will be devolved after a No vote.
Shadow chancellor Ed Balls, in an article in the Daily Record, called on Scots not to use their votes as a protest against Conservative policies from Westminster.
A YouGov poll for the Sunday Times suggested the Yes campaign is now in the lead for the first time, with 51% in favour of independence compared to 49% against.
Another survey, by Panelbase, put the No campaign still ahead by two points at 52%.
Last month, Alex Salmond’s campaign was behind by 22 points.
Chancellor George Osborne promised a “plan of action to give more powers to Scotland” would be revealed this week, including details of a timetable and process of further devolution from Westminster.
Former Nato Secretary General Lord Robertson, who is campaigning with former Scottish secretary Jim Murphy, said Scottish independence would have a “cataclysmic” impact.
But Scottish First Minister Mr Salmond dismissed the devolution pledge as a “bribe”.
He told the BBC’s Sunday Politics Scotland: “Are we expected to believe, after hundreds of thousands have already voted, that there’s a radical new deal?
“This is a panicky measure made because the Yes side is winning on the ground.”
His deputy in the Scottish National Party, Nicola Sturgeon, will be joined by Plaid Cymru Welsh nationalist leader Leanne Wood on the campaign trail this week.