A review of Holyrood voting and boundaries is being carried out

It made the suggestion in a submission to the inquiry into the boundaries and voting system used for Holyrood.

Scotland has four different voting systems for elections to Holyrood, Westminster, the European Parliament and local councils.

Scottish Secretary Alistair Darling set up the Arbuthnott Commission last year to look at ways of reducing confusion.

He was prompted to set up the inquiry after the reduction in the total number of Scottish Westminster seats from 72 to 59 which had no corresponding reduction in the 129 MSPs.

Sir John Arbuthnott and his colleagues have been receiving submissions on possible changes for Holyrood elections.

Final decision

Labour has suggested scrapping the second vote, to stop the perception of two-classes of MSP and prevent list members "cherry-picking" issues.

Instead they would be elected on the basis of the first vote.

The Scottish National Party and the Liberal Democrats argue for a new proportional system using the single transferable vote in multi-member constituencies.

Conservatives want MSP numbers cut.

The Greens and the Scottish Socialists fear being squeezed out and want to keep the existing two-vote system.

The final decision on the voting system for Holyrood is the responsibility of the Westminster parliament. And the stance taken by the Labour group of MSPs could put them at loggerheads with the UK Labour government if it decides to accept the Arbuthnott recommendations.