Ahead of the COP26 climate change summit, Joe Lycett takes on one of the world's most powerful companies - Shell - as he investigates whether its eco-friendly advertising really paints the right picture of a corporation that still drills a huge amount of oil and gas. Joe meets climate experts and attempts to engage Shell in his own uniquely fearless fashion, before deciding to make his own version of their ads and tries to get his parody broadcast on national television