Anderson has been active in supporting numerous charity organizations, global and social causes, as well as running her own humanitarian ventures. She supports The Trevor Project organization, focused on suicide prevention efforts among LGBTQ youth and attended three of the Trevor Project's "Cracked X-Mas" events to benefit the organization. In 2013, Anderson was made a patron of the Charles Dickens Statue Fund, and was instrumental in securing the funding for UK's first Dickens statue, located in Portsmouth, Hampshire. In June 2016 she became a patron of the Temple Legal Centre, a London-based organization that assists people through the legal process by providing them free family law advice and support. In June 2016, Anderson expressed her support for the United Kingdom to remain a member of the European Union in the run-up to June's referendum on that issue. In January 2018, Anderson was given a City Lit Lifetime Fellowship Award by the adult education college City Literary Institute.