The idea for the four year old pigchild was dreamt up in a London pub by three out of work mates in the 90s. She’s now the inspiration for theme parks across the world, and they are worth millions. After the prime minister declared his love for her in front of the UK’s leading business people, Mark Coles explores how Peppa Pig has become one the most recognisable characters on television.

Producers: Ben Crighton and Chris Flynn