PUBLISHED: 10:05 25 July 2017 | UPDATED: 10:05 25 July 2017
Embargoed to 0001 Monday July 24
File photo dated 09/02/15 of Quorn products, as the boss of Quorn Foods has backed the firm to ride out any Brexit disruption to its European business as he unveiled plans to create 300 jobs and invest £150 million in the UK. PRESS ASSOCIATION Photo. Issue date: Monday July 24, 2017. See PA story CITY Quorn. Photo credit should read: Nick Ansell/PA Wire
From flexitarians to fruitarians, fads for diets are turning in to big business for food manufacturers and restaurants.