The party won its first seat in the local elections in May 2019. Mayer stood as the lead candidate for the party in the 2019 European Elections in London. Mayer co-founded the Primadonna Festival in 2019, a festival of ideas, writing, music and comedy at Laffitt's Hall in Pettaugh, Suffolk, aiming to give prominence to women and to new voices. Mayer was married to the musicican Andy Gill of Gang of Four until his death in February 2020.