Former Prime Minister will call on Scots to vote 'no' in September during a keynote speech for Better Together.
Gordon Brown will set out why Scotland should remain part of the UK later.
In his first major speech, on behalf of the Better Together campaign, he'll tell an audience at Glasgow University that we can have the best of both worlds.
The Kirkcaldy and Cowdenbeath MP will highlight the benefits of pooling and sharing resources across the UK.
He'll also focus on pensions and public sector pension liabilities.
‘Time and time again, Westminster has failed Scots when it comes to pensions. People haven't forgotten Gordon Brown’s tax raid on pension funds. And the current Tory changes to the state pension will, according to the Institute of Fiscal Studies, see the vast majority of pensioners worse off. That's why more and more people in Scotland are moving to Yes.
‘With a Yes vote, we can build on the successes of the Scottish Parliament and continue delivering for older people with free personal care and the free bus pass.’