Independent Insurance has become the first full sponsor of the Grosvenor House Art and Antiques Fair, which last year offered more than £300 million of goods for sale to some 20,000 visitors.
Independent said the £120,000 sponsorship package will give it "considerable exposure, publicity and entertaining opportunities" at the fair, which runs from June 14 to 20, and the charity gala evening in aid of Barnardo's on June 15.
Marketing manager Graeme Sutton said: "We first became involved with the fair last year and found it a perfect match for our private client risk management business."