Associated Society of Locomotive Engineers and Firemen (Aslef)

Associated Society of Locomotive Engineers and Firemen (Aslef)

Scottish members: 1600

In May 2013, 73 delegates at UK annual conference in Edinburgh voted unanimously to back No vote.

Donations to Labour since 2010: £231,000

GMB

Scottish members: 56,000

After consultation meetings, delegates to regional council in Scotland in October 2013 decided to back a No vote.

Donations to Labour since 2010: £6m

Union of Shop, Distributive and Allied Workers (Usdaw)

Scottish members: 46,000

Decision to back a No vote taken in spring 2012 by delegates at UK conference.

Donations to Labour since 2010: £5.2m

Community

Scottish members: 3000

Vote to join Better Together was carried 151-2 by delegates at UK conference in July 2013.

Donations to Labour since 2010: £592,000

NUM

Scottish members: 85

Currently consulting members .

Donations to Labour since 2010: £9000

Communication Workers Union (CWU)

Scottish members: 17,500

Consultation meetings and briefing paper launched in October 2013. Will decide position in New Year. Final vote will be by delegates at UK conference in Bournemouth in April 2014.

Donations to Labour since 2010: £2.2m

Public and Commercial Services Union (PCS)

Scottish members: 30,000

Scottish arm has been consulting since 2012. Produced 100-page report last month for members on independence, with a survey showing pensions and job security are their priority. A consultative conference of branches will take place to decide a campaign stance in the New Year.

Not affiliated to any party

Unison

Scottish members: 160,000

Has produced series of papers on greater devolution. Branch delegates will report on progress next month, with Scottish Council taking a decision on stance in February.

Donations to Labour since 2010: £6.2m

Educational Institute of Scotland (EIS)

Scottish members: 56,000

Delegates decided not to a adopt a position in the referendum, as EIS members' views are diverse.

Not affiliated to any party

Unite the Union

Scottish members: 150,000

Leadership wants members to be fully informed about impact of independence, but does not currently envisage taking a position on referendum. This may change.

Donations to Labour since 2010: £14.2m

Prison Officers Association Scotland

Members: 3000

Majority vote to back a Yes vote by 34 delegates at Scottish conference last month. General secretary Steve Gillan said vote was endorsement of SNP delivering on pensions and keeping prisons in public sector.

Not affiliated to any party

Donations include staff time and sponsorship, and help to Labour HQ and constituency branches