When the referendum of 1979 failed to deliver the required mandate for devolution, the Nationalists withdrew their support for the Labour Government, resulting in a general election in 1979, which was won by the Conservatives. Despite being the only major party now opposing constitutional change and despite their reduced popularity and strength in Scotland, Conservative electoral victories in 1983, 1987 and 1992 ensured that no further legislative progress was made until the election of Labour under Tony Blair in 1997 led to a second devolution referendum.