The Green Party of England and Wales is a green, left-wing political party in England and Wales. Since October 2021, Carla Denyer and Adrian Ramsay have served as the party's co-leaders. The party currently has one representative in the House of Commons and two in the House of Lords, in addition to over 800 councillors at the local government level and three members of the London Assembly.

Left-wing politics describes the range of political ideologies that support and seek to achieve social equality and egalitarianism, often in opposition to social hierarchy as a whole or certain social hierarchies. Left-wing politics typically involve a concern for those in society whom its adherents perceive as disadvantaged relative to others as well as a belief that there are unjustified inequalities that need to be reduced or abolished through radical means that change the nature of the society they are implemented in. According to emeritus professor of economics Barry Clark, supporters of left-wing politics "claim that human development flourishes when individuals engage in cooperative, mutually respectful relations that can thrive only when excessive differences in status, power, and wealth are eliminated."