 Towards the end of the twentieth century, it became a centre of the struggle against the poll tax; which was introduced in Scotland a whole year before the rest of the United Kingdom and also served as the main base of the Scottish Socialist Party, another left-wing political party in Scotland.The city has not had a Conservative MP since the 1982 Hillhead by-election, when the SDP took the seat, which was in Glasgow's most affluent area.The fortunes of the Conservative Party continued to decline into the twenty-first century, winning only one of the 79 councillors on Glasgow City Council in 2012, despite having been the controlling party (as the Progressives) from 1969 to 1972 when Sir Donald Liddle was the last non-Labour Lord Provost.