Scottish Labour is the Scottish wing of the Great Britain-wide Labour Party. It was the most successful party in Scottish elections from 1959 to 2007. Like the wider UK Labour Party, they are centre-left and they promote British unionism. They first overtook the Conservatives as Scotland's largest party at the 1959 general election. In 1997, the UK Labour Party under Tony Blair offered Scotland a referendum on devolution which was passed with around 74% of the electorate in favour. From 1999 to 2007, they were in power in the Scottish Parliament through a coalition with the Liberal Democrats. From 2008 to 2011, the party was led by Iain Gray in the Scottish Parliament, who announced his resignation after the party's defeat at the 2011 Scottish election. Johann Lamont became leader in 2011 and resigned in 2014 after an internal dispute within the party. Subsequently, they were led by Jim Murphy, Kezia Dugdale and Richard Leonard. They currently have one MP and 22 MSPs. they are led by Anas Sarwar MSP.