Royal warrants, w hich have been issued by the British royal family since the 15th century, are a mark of distinction for companies who have provided goods and services for at least five years to Queen Elizabeth II, Prince Philip or Prince Charles. Suppliers range from silversmiths, champagne houses, perfumers and shoemakers to agricultural crop sprayers and biscuit brands. There are currently about 800 royal warrant holders throughout Britain.

Vetting is fierce. If approved (most applicants are not), the company snags the ultimate endorsement: the honor of displaying the royal coat of arms, along with the prestigious “by appointment” legend alongside the company logo, a practice that can be traced to the reign of Elizabeth I.

With the help of a royal warrant road map, tourists can effectively shop t he royal family’s go-to brands, centuries-old companies that represent top quality, heritage and craftsmanship. A guide to the warrants offers something for everyone. The brands are not only for people who can afford to buy a $5,000 bespoke suit without batting an eye, but includes purveyors of cheese, tea, books and grooming products. The road map is an opportunity to scoop up meaningful souvenirs without spending a fortune.

Companies with the royal warrant are so well respected that at least two fashionable hotels, the Beaumont and Hotel Cafe Royal, are o ffering royal wedding packages that feature walking tours to some of these esteemed businesses.