As Her Majesty Queen Elizabeth II marks 70 years on the throne, we find out how you get a royal warrant.

It’s an official seal of approval granted to the suppliers of goods and services to the Royal household.

In London we visit one of Britain’s oldest cheese shops, Paxton & Whitfield, established in 1797. Managing director James Rutter tells us about the royal warrants the business has held since Queen Victoria was on the throne. We also visit Windsor, home to Windsor Castle one of the Queen’s many properties and Windsor & Eton brewery, which was awarded a royal warrant in 2018. Owner Will Calvert tells us what it takes to get this royal recognition.

Royal Warrant holders can’t tell you much about what the royal household buys or likes, we try to fill in the gaps with royal and social historian Caroline Aston, features writer for Majesty Magazine.

If you would like to get in touch with the show, please email: thefoodchain@bbc.co.uk

Presented by Ruth Alexander.

Produced by Beatrice Pickup.