The Coronation Festival, to be held at Buckingham Palace from July 11-14, will celebrate the range of brands which have earned a Royal Warrant.
The warrants are given in recognition of those that have supplied goods or services for at least five years to the households of the Queen, Duke of Edinburgh or the Prince of Wales.
Calders & Grandidge, which was awarded its Royal Warrant in 1986, will showcase its fencing, gates, planters and garden furniture, joining more than 200 other warrant holders at the event.
The festival, which will be open to the public from July 12-14, will include three gala evenings.
