The Scottish budget for the year ahead is expected to be approved, despite continued opposition concern.
The Scottish government is on course to pass its 2010 budget after unveiling a series of last-minute concessions to win support from opposition parties.
The minority SNP government has offered last-minute investment for a boiler scrappage scheme and has made moves to boost housing, education and business.
Finance Secretary John Swinney announced a series of measures to boost housing, education and business, while warning of a spending squeeze ahead.
Labour demanded an 11th-hour reinstatement of the Glasgow Airport rail link, but that is unlikely.
Labour refused to back the £30bn plans over the SNP's refusal to reinstate the Glasgow Airport rail link.
The £30bn budget may pass the crunch Holyrood vote with Tory and Green support. The Lib Dems could abstain.
MSPs are voting on the Scottish budget in parliament later.
Scottish Finance Secretary John Swinney said the £300m airport rail link had to go to deal with a predicted public spending squeeze in the coming years.
Mr Swinney said the spending plans would protect frontline services, such as schools and hospitals, and aid economic recovery.
Brian TaylorPolitical editor Scottish ministers say they'll match the English plan for a boiler scrappage scheme.
Capital projects
Which means what? That they will find £2m to provide £400 for everyone who chooses to replace the oldest generation of domestic boilers.
He said: "2010-11 marks the start of a period of real tightening of public spending and the implications of that cannot be avoided in this year or future years.
Which means what, seriously? That this is a further hook for the Greens in the budget talks - and an attempt to discomfit Labour.
"We must take tough decisions this year and the government has been prepared to do that and, secondly, we must take steps to prepare our public services and our public finances for the very challenging years to come."
You'll remember that Labour has been pressing for weeks for Holyrood to match the Westminster plan.
In response to opposition demands, the finance secretary announced a £2m boiler scrappage scheme and curbs on public sector pay.
Scottish ministers indicated their emphasis was upon more general measures to improve fuel efficiency, targeted upon low-income families.
And, under a revision of the current budget, ministers set out a £20m boost to meet the surge in demand for college places, £10m to support access to finance for firms and an additional £31m for affordable housing.
However, on the day of the budget, they've budged.
The government also decided to publish information on the progress of its 36 largest capital spending projects, such as the new Southern General Hospital in Glasgow, although the move did not amount to the month-by-month outline demanded by rival parties.
They hope it will make it more difficult for Labour to say no.
Ministers said the £300m airport rail link had to go to deal with a predicted public spending squeeze in the coming years - but Labour said the cancellation would cost Glasgow more than 1,300 jobs.
But Scottish Labour leader Iain Gray said the cancellation would cost Glasgow more than 1,300 jobs, adding: "It is not only a blow to the West of Scotland but will harm Scotland's competitive edge."
Scottish ministers will put pressure on Labour to back the budget by announcing a £2m plan to extend the replacement of old domestic boilers, a scheme already running in England.
It would entitle anyone replacing the oldest category of domestic boiler to £400 assistance.
Under a revision of the current budget, ministers set out a £20m boost to meet the surge in demand for college places, £10m to support access to finance for firms and an additional £31m for affordable housing, reflecting key opposition demands.
And the government decided to publish information on the progress of its 36 largest capital spending projects, such as the new Southern General Hospital in Glasgow, although the move did not amount to the month-by-month outline demanded by rival parties.
Mr Swinney has said he would welcome suggestions from opposition parties which protected frontline services and promoted economic recovery.
He has already announced a pay freeze for senior civil servants and has been considering a Liberal Democrat demand to cut the pay of the highest public sector earners.
The Conservatives' Derek Brownlee said his party would make its final budget vote decision on Wednesday afternoon.
The two Green MSPs, who won a budget concession for £10m renewable energy funding, said more needed to be done on home energy efficiency.
The party played a key role in parliament rejecting the budget last time round, before it was passed on the second attempt.
