Lynch is active in community politics in Finchley. He is also a founder member of "The Archer", a community newspaper for the N2 area, and he founded the East Finchley Traders Association. He was on the Administrative Committee of the Finchley Society and spent six years as a voluntary adviser with the East Finchley Advice Centre. Before becoming a member of the London Assembly, he worked for the No-Euro campaign. In addition, he is the founder of an independent newspaper, "London Green News".