the same year which saw the party decline to below 25% of the vote and drop from 21 seats to 16. At the same time, the SNP were to gain an unprecedented 11 MPs, unseating a number of Conservative MPs in rural constituencies. The party's fortunes recovered somewhat in 1979 under the leadership of Margaret Thatcher, but her tenure as Prime Minister was to see the party's fortunes drop further from holding 22 seats in 1979 to 10 in 1987. The party increased its share of the vote and number of MPs to 11 in 1992 under John Major's leadership before dropping to 17.5% of the popular vote and failing to have any MPs returned from Scotland in 1997. It continued to return only a single MP from Scottish constituencies at the 2001, 2005, 2010 and 2015 general elections, before winning 13 seats in 2017. Following the 2010 general election performance, the party commissioned a review under Lord Sanderson of Bowden to consider the party's future organisation. The Sanderson Commission's report recommended a single Scottish leader (replacing a leader of the Scottish Parliamentary group), reforms to governance and constituency structures, the creation of regional campaigning centres, greater focus on policy development and a new membership and fundraising drive. Scottish devolution The party's commitments to a devolved Scottish Assembly were to decline under the leadership of Margaret Thatcher. Previously the party had offered some support for a Scottish Assembly, including in the so-called Declaration of Perth in 1968 under UK party leader Edward Heath. John Major, while endorsing further powers for the Scottish Grand Committee and the Scottish Office did not support a devolved parliament. With the Labour Party's victory in 1997, referendums on devolution were organised in Scotland and Wales, both receiving agreement that devolved legislatures should be formed. In 1999, the first elections to a devolved Scottish Parliament were held. Following the Conservatives electoral wipe-out in Scotland in 1997, devolution provided the party with a number of parliamentary representatives in Scotland. Less than a year following the first Scottish Parliament election, a 2000 by-election was held in the Ayr constituency with John Scott winning the seat from Labour. In the party leadership elections in 2011, the previous deputy leader Murdo Fraser proposed disbanding the party and creating a new Scottish party of the centre-right, similar to the previous Unionist Party and compared this arrangement to the relationship between the