On 23 December 2010, Sheridan was convicted of perjury during the 2006 defamation action, and sentenced to three years imprisonment on 26 January 2011.

After a close vote the interim title of "Solidarity – Scotland's Socialist Movement" was adopted as the name of the party, and Rosemary Byrne and Tommy Sheridan were unanimously endorsed as co-convenors.

[14] In March 2009 Solidarity joined No to EU – Yes to Democracy, a left-wing eurosceptic coalition for the 2009 European Parliament elections,[15][16][17] which received 9,693 votes (0.9%) in Scotland.

Sheridan stood for election to Westminster in 2010 under the Trade Unionist and Socialist Coalition banner, winning 931 votes (2.9%) in Glasgow South West and losing his deposit.

In January Galloway had announced his intention to stand for Holyrood after failing to gain a seat at Westminster as a Respect party candidate in the May 2010 election.

In June 2016 Sheridan resigned from his position as co-convener of the Solidarity, and Councillor Pat Lee elected to replace him alongside Byrne.

[26] Solidarity has been accused of using entryist tactics in North Lanarkshire, with it being claimed that activists close to the party have infiltrated SNP branches in the area.

In March 2016 several leading activists left the party, citing its failure to adequately respond to members' reports of bullying and harassment.