The Queen will celebrate the 60th anniversary of her coronation at a festival showcasing leading British companies.
Organised by the Royal Warrant Holders Association, the event will feature more than 200 of the brands which have supplied goods or services for at least five years to the Households of the Queen, the Duke of Edinburgh or the Prince of Wales.
Over the next three evenings the gardens will also host a performance of music and dance highlighting cultural life during the Queen's six-decade reign.
Stars such as Dame Kiri Te Kanawa, Katherine Jenkins, Katie Melua and the English National Ballet will perform.
More top news
Goals from Charlie Austin, Dusan Tadic and James Ward-Prowse consigned Slaven Bilic's men to their fourth straight Premier League loss.
A bizarre protest against BP sponsorship at the British Museum used theatre, sea shanties and 'mermaids' to 'summon a Kraken'.
Two men have been jailed for robbing a man aged 79 as he was washing his car.