Finance Secretary Derek Mackay is getting closer to a Budget deal with the Greens
Another frantic round of closed-door negotiations with rivals ahead of today's first crunch vote ended in deadlock.
Talks with the Lib Dems, who had been seen as the most likely to support the SNP, all but collapsed after they were reportedly offered just £70 million of a £400 million of extra public spending demand.
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Green co-convenor Patrick Harvie had previously said his party would not back the Budget unless there was a more "progressive" approach to tax.
But yesterday said he was now "not willing" to see it fail after signalling he would accept ministers will not cave in to his demands.
Green co-convenor Patrick Harvie said he will 'put pressure' to give ground to his position
He told the BBC: "If parties just dug their feet in and said 'my way or the highway' then the whole thing would fall and we would begin to see emergency cuts being made to public services across Scotland.
The other parties appear to have given up on playing any constructive role in negotiations
Green party spokesman
"I'm not willing to see that happen, but I am entirely willing to put pressure on the Scottish Government to give ground on the position that it's taken so far."
It is understood a final sticking point for their support is more cash for councils amid "substantial and unacceptable cuts".
A Green party spokesman said: "We have set out a range of ways in which ministers can find additional funds to protect local services, one of which is using new powers over income tax to ensure that higher earners pay a little more.
Lib Dem leader Willie Rennie said his party could end up voting against the Budget
"The other parties appear to have given up on playing any constructive role in negotiations."
Lib Dem leader Willie Rennie said: "Despite making considerable effort to engage in constructive talks with the Scottish Government we are firm that if we do not see the changes we believe the country needs then we will vote against the Budget."
Scottish Labour has tabled an amendment calling for increases to income tax, and a new 50p rate for earnings above £150,000 to raise funds for local services.
Labour would not back any budget that cut funding from local services
Leader Kezia Dugdale said her party would not back any budget that cut funding from local services, calling her amendment a "positive alternative".
A final vote takes place later this month and, if it fails to get the plans passed, the Government could move for an election.
Mr Mackay defended his proposals insisting they will have a "positive impact on our economy and public services".
“I do not expect that all parties will agree with every aspect of the draft Budget but there are large areas that should have unanimous support.
"I am confident that those who share that view will find the common ground needed to come to agreement, support this Budget and invest in our crucial public services.”
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