Lord Tim Bell was always a good salesman. Founder of the infamous PR firm Bell Pottinger, he was the original spin doctor who saw Margaret Thatcher through three elections, masterminding the ‘Labour Isn’t Working’ ad campaign, before branching out to work with foreign governments, oligarchs and magnates across the world.

Featuring a series of frank interviews with Lord Bell himself, filmed in 2018, Influence charts Bell Pottinger’s rise to global status and its ignominious fall in 2017, implicated in a South African corruption scandal and a nefarious campaign to ignite racial tensions.