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
A coffee shop in Fitzrovia is allowing customers to buy discounted hot drinks and pass them on to a homeless person
A man has been jailed for seven years for raping a woman after she fell asleep on a night bus in Hampstead
Police are trying to find a man who beat a woman so badly on a DLR train that her front teeth were broken and glasses smashed