Polly Mackenzie has served as head of one of Westminster’s most influential centrist think tanks since 2018. Before joining Demos, Mackenzie was a journalist and served as a senior policy adviser for the Liberal Democrats. She was Nick Cleggs speechwriter from 2007 to 2009, going on to serve as his special adviser from 2010 to 2015 while Deputy Prime Minister. After a stint at the Women’s Equality Party, Mackenzie rejoined the frontline Westminster furore in her current role. She has argued recently for greater transparency in online political advertising.
