The King and Queen Consort have been pleased to approve that the rules governing the commercial use of Royal Photographs and Official Insignia may be temporarily relaxed to allow their use on souvenirs marking the Coronation. Official guidance may be downloaded here

The guidance states:

Correct versions of the Royal Arms and the Royal Cyphers should be used. Examples may be obtained (on payment of a fee) by application to Garter King of Arms. In Scotland, so far as the Royal Arms are concerned, examples may be obtained from the Lord Lyon King of Arms, H.M. New Register House, Edinburgh, EH1 3YT. Advice on approved versions of other Royal, National or Regional devices is obtainable from Garter King of Arms or Lord Lyon King of Arms.

Souvenirs of The Coronation may not be manufactured after 6th November, 2023.

For advice on the use of any Royal insignia or devices in connection with the Coronation, on flags, or on souvenir items, please contact the College of Arms.