In the
2015 United Kingdom general election, the party nominated one candidate, the BDP chairman, Jim Lewthwaite in
Bradford East. He won 210 votes, 0.5% of the total cast. The party gained a parish councillor in March 2022, when John Robinson, who was elected to
Barnham and
Eastergate Parish Council in
West Sussex as an independent, joined the BDP. In July 2022, Julian Leppert, an elected councillor representing the
For Britain Movement on
Epping Forest District Council in
Essex, joined the BDP. The party gained another parish councillor in August 2022, when Roger Robertson, an elected councillor in
Hartley Wintney,
Hampshire, joined the British Democrats. He like Leppert was also a former member of the For Britain Movement. Later that month, BDP candidate Lawrence Rustem was elected unopposed to
Detling Parish Council in
Kent, in what was the party's first ever election victory. In October 2022, the BDP candidate, Christopher Bateman, was elected to
Noak Bridge Parish Council in
Basildon, Essex, with 74% of the vote against one other candidate who was an independent. The British Democrats, whose campaign received support from the far-right hate group
Patriotic Alternative, stood five candidates in the
2023 local elections. All candidates failed to win their contests, with Julian Leppert losing the party's only seat above parish council level. In March 2024, British Democrat candidate Ken Perrin won a by-election to a seat on the
Chatteris town council in
Cambridgeshire with 47% of the vote. Perrin had previously worked as the North East Cambridgeshire organiser for the
UK Independence Party. The party stood four parliamentary candidates in the
2024 general election: Christopher Bateman in
Basildon and Billericay, Gary Butler in
Maidstone and Malling, Frank Calladine in
Doncaster North, and Lawrence Rustem in
Faversham and Mid Kent. They received 1,860 votes. In 2025, British Democrat candidate Peter Lawrence was elected to the Mylor council in
Cornwall. Meanwhile, former parliamentary candidate Frank Calladine was elected onto two separate parish council seats in
Doncaster, representing the Sprotbrough and Cusworth council and the Brodsworth council. Calladine also stood as the British Democrats' candidate for the
2025 Doncaster mayoral election,{{Cite web|url=https://www.bbc.co.uk/news/articles/cdxnyqx1ev4o|title=The candidates vying to be Mayor of Doncaster ==Notable members==