Anton Georgiou, who represents Alperton ward, near Wembley, announced last week he was standing down from Brent Council.
Mr Georgiou won his seat in 2020, becoming the first Liberal Democrat to return to Brent Council after a four-year absence.
He served as the sole Liberal Democrat councillor in the borough until May 2022, when he was re-elected and was joined in the chamber by councillors Paul Lorber and Hannah Matin.
Lib Dem leader since May 2022, he focused on leading a strong and effective opposition group against the incumbent Labour administration.
In 2021 he wrote to Brent’s then chief executive Carolyn Downs accusing Brent Council leader Cllr Mohammed Butt of “bullying and intimidating him” after Cllr Georgiou challenged a council tax hike.
Earlier this year he accused the council leader of “stifling democracy” over plans to increase the number of councillors’ signatures needed to call in a decision, such as planning applications, for reconsideration.
Mr Georgiou’s record in Brent includes standing as a council candidate in Dudden Hill in 2014.
He was selected as the GLA candidate for the Brent and Harrow constituency during the 2016 mayoral elections and was beaten by Labour’s Navin Shah.
He helped set up Brent Refugee Action Group for those fleeing violence in Syria and other war-torn countries, explaining at the time how his own family arrived in the UK after the Turkish invasion of Cyprus in 1974.
A staunch Remainer, he actively campaigned to stay in Europe.
In 2016 he was a campaigns officer for the European movement, a national all-party movement, and he also set up the group Brent in Europe.
Mr Georgiou has been contacted for comment.
