The Scottish TUC (STUC) called yesterday for two-thirds of the revenue spent in Scotland to be raised in Scotland in a new plan for enhanced devolution if there is a No vote in September's referendum.

STUC general secretary Grahame Smith said: "While we have not come to a definitive view on recommending a Yes or No vote, it is increasingly clear that there is a strong case and strong public support for building on the current status quo."

The STUC wants the pro-devolution parties to bring forward separate proposals for enhanced devolution in the event of a No vote - and identify a set of proposals on which they all agree.

Grahame Smith called on the parties to give "very clear commitments both in respect of future tax powers and in defending the level of a residual block grant."

The 20-page discussion paper A Just Scotland - Enhanced Devolution argues that the Scottish Parliament should be able to intervene on a wider range of policy issues - including the labour market and various aspects of pay, employment rights and welfare.

Further devolution of tax and spending powers should be accompanied by an increase in the revenue-raising autonomy of local authorities.

Other STUC proposals include the establishment of a Scottish Equalities Commission, devolution of health and safety enforcement, the employment tribunal system and some powers over immigration.

And the STUC claims that "enhanced devolution need not entail a reduction in the number or function of Scottish MPs."