Heidi Blake is a multi-award-winning investigative journalist. She was assistant editor of The Sunday Times, attached to the Insight team, until spring 2015 when she became BuzzFeed's UK investigations editor. She lives in south-east London. Jonathan Calvert has worked for various newspapers in a long and distinguished career as an investigative journalist. He is the longest-serving editor of the Insight team at The Sunday Times, having held the role for more than ten years, He lives in west London.