Today’s bonus guest is Dr Chris van Tulleken, he's the author of the bestselling book Ultra Processed People, an infectious diseases doctor and broadcaster. Now for anyone who’s been listening to Big Fish for a while, you’ll know that this book absolutely changed my life. It’s an eye-opening...

Frankie Bridge is best known for her pop career - she was a member of one of the UK’s most successful girl bands, The Saturdays, and pop group S Club Juniors, which she joined at just 12-years-old. She’s also the Sunday Times bestselling author of OPEN: Why Asking for Help Can Save Your Life and...