Sir Mark Trevor Phillips is a British writer, broadcaster and former politician who served as Chair of the London Assembly from 2000 to 2001 and from 2002 to 2003. He presented Trevor Phillips on Sunday, a Sunday morning talk show on Sky News, from 2021 to 2022, and Sunday Morning on Sky News from 2023

The London Assembly is a 25-member elected body, part of the Greater London Authority, that scrutinises the activities of the Mayor of London and has the power, with a two-thirds supermajority, to amend the Mayor's annual budget and to reject the Mayor's draft statutory strategies. The London Assembly was established in 2000. It is also able to investigate other issues of importance to Londoners, publish its findings and recommendations, and make proposals to the Mayor.