The 2011 Scottish Parliament election, however, delivered the first majority government of the devolved Scottish Parliament as the SNP won a landslide of 69 seats, considered a remarkable feat as the Additional Member System used to elect MSPs was originally implemented to prevent single-party governments, as well as to produce proportional results. Following the result, the leaders of all the main opposition parties resigned their positions. The SNP's victory came on the back of the collapse of the Lib Dems, who was tainted by its participation in the Conservative-led UK Government, while Scottish Labour had clearly failed to inspire voters in opposition. Later, the SNP confirmed its intent to hold a referendum on Scottish independence.