Outside her academic work, Falk was a decades-long member of the Hampstead Labour Party, working in campaigning and fundraising from her home in Hampstead Hill Gardens.[5] However, she was opposed to the 2003 invasion of Iraq and New Labour,[2] which fellow party members described as "the party moved away from her."[5] Falk heavily campaigned in support of the National Health Service (NHS), and she protested against a perceived threat to privatize it, which she feared would create a situation in which there would be an "Americanised service, where people will have to pay for healthcare through insurance, as has happened with dentists in this country".[3]