Nicola Sturgeon named her price today for putting Jeremy Corbyn in power: a Scottish independence referendum next year.
The SNP leader and Scottish First Minister warned Boris Johnson not to stand in the way of a new separatist vote as she suggested she would be prepared to help the Labour leader become prime minister.
The Scottish First Minister said she would not do any deals with the current prime minister if the there was a hung parliament but was open to an informal arrangement with Labour.
Mr Johnson has constantly said he will not grant a new referendum, but launching the SNP's election campaign today in Edinburgh Ms Sturgeon said that if it is the largest party in Scotland after the election, it would give them a mandate.
'My intention is that the people of Scotland decide Scotland's future in an independence referendum next year,' she said.
'The SNP already has a cast-iron mandate for an independence referendum, based on our explicit manifesto pledge for the 2016 Holyrood election.
'So if the SNP wins this election in Scotland, the question should not be to me or to the SNP; what will you do if Westminster refuses?
'The question must be to Boris Johnson and to Westminster; what gives you the right to block the democratic wishes of the people of Scotland?
'That is an undemocratic, untenable and unsustainable position.'
Ms Sturgeon told the campaign launch in Edinburgh today (pictured) : 'I'm no fan of Jeremy Corbyn, but you must work with what is in front of you'
Mr Johnson (pictured today in Mansfield) has constantly said he will not grant a new referendum
Mr Corbyn has previously said he would be open to a new Scottish independence referendum, albeit not in the immediate future
Ms Sturgeon also said that a vote for her nationalist party was 'a vote to escape Brexit'
Ms Sturgeon she was open to a 'progressive alliance', suggesting she could back Mr Corbyn in exchange for a new referendum.
She said: 'I'm no fan of Jeremy Corbyn, but you must work with what is in front of you ... we would drive a hard bargain.'
Mr Corbyn has previously said he would be open to a new Scottish independence referendum, albeit not in the immediate future.
The last referendum in 2014 saw the country vote 55-45 in favour of staying in the UK.
Ms Sturgeon also said that a vote for her