Paul Sweeney expects the UK Labour party to move to the same position that the Scottish party adopted on Saturday.Read more
Scottish Labour leader Richard Leonard told the BBC he was "more and more compelled" to believe that there should be another vote on the UK's future in Europe.
Scottish Labour's David Martin describes his 35 years as an MEP as a "real cultural experience".
The SNP is on course to increase its number of MEPs from two to three in the European elections amid a collapse in support for Scottish Labour.
With 31 of the 32 Scottish council areas having declared their results, the SNP has 37.9% of the votes - up from 29% in the last EU election.
Nigel Farage's Brexit Party has the second-most votes and will have one MEP, as will the Lib Dems and Tories.
Labour is fifth with just 9.3% of the votes - down from 26% in 2014. It means Labour will lose both of its MEPs in Scotland.
The Western Isles will not declare its result until later on Monday, but it is unlikely to affect the overall Scottish result.
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