Food Story has been appointed as the sole accredited kosher caterer by Historic Royal Palaces for venues including Kensington Palace, Hampton Court Palace, Banqueting House and the Tower of London.
Matt Rickard, managing director (pictured), said: "This is another significant milestone for Food Story. We are absolutely thrilled by the appointment; it's an outright testament to the expertise and ability of the team.
"We already have the most enviable list of partner venues and now to add the Historic Royal Palaces is a real coup - we are all very proud."
He added: "For larger events the Historic Royal Palaces offer exceptional value and have simply stunning spaces for celebrations and charity events for up to 300 guests, as well as having many beautiful venues for smaller exclusive events.
"Now clients can choose these stunning locations as a setting for their very own Food Story whilst supporting a charity that focuses on the continued restoration of the magnificent palaces."
In July this year, the company announced a new partnership with the Maybourne Hotel Group, owner of Claridge's, the Connaught and the Berkeley hotels in London.
Food Story started in 2015 and is owned by Jonathan Hammé, Justin Randall and Michael Paradise.
It provides catering at more than 100 venues across the capital including the National History Museum, Spencer House, Claridge's, Rosewood London, Four Seasons Park Lane & Hampshire, Wickham House and Soho Farmhouse.
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