The SUP contested elections including the
Scottish Parliament elections in
1999,
2003,
2007 and
2011. In 2003, the SUP contested only the
Glasgow,
Central Scotland and
West of Scotland Additional Members System electoral regions, yet failed to poll enough votes to elect any
MSPs. It also contested only six
local council wards in 2003, all located in the West
Central Belt where the traditional "Orange vote" resides. In one
Glasgow city centre seat (Kingston), they achieved third place. The SUP also stood for two seats at the
2001 general election, in
Glasgow Springburn and
Airdrie and Shotts. The party managed to retain its deposit in the former and almost did so in the latter. This was not so surprising in Springburn, for there was no Conservative candidate since it was the constituency in which the
Speaker,
Michael Martin, was seeking re-election, but in Airdrie and Shotts, despite the presence of a Conservative and Unionist candidate, the SUP still managed to poll 4.5% of the vote. At the
2005 general election the party fielded its leader, Daniel Houston, in
Glasgow North East against Speaker Martin again; Houston won 4.5% of the vote, almost enough to retain his deposit. The party failed to win any seats at the 2007 Scottish Parliament elections or the
Scottish local elections held at the same time. According to the 2007 statement of accounts with the
Electoral Commission the party has 128 members, which was up by 10 on the previous year though income from memberships fell from
GBP 572 to GBP 365. It was deregistered by the Electoral Commission on 6 November 2009. However, the party appeared to have revived in 2012, when it ran a slate of candidates in the
Glasgow Council elections, receiving 586 votes. It also fielded two candidates in the
South Lanarkshire Council elections where their candidates received an average of 3.2% of the vote in the two wards it stood in. The SUP did not field any candidates for the
2021 Scottish Parliament election, with Johnathan Stanley, the party chairman, standing unsuccessfully for the pro-union
All for Unity party on the
Central Scotland list. Stanley would later run as the SUP candidate in the
2021 Airdrie and Shotts by-election, coming sixth out of eight candidates, with 59 votes (0.3%). It was deregistered in November 2021, and re-registered in February 2022. ==Campaigns==