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The 2015 event runs from April 16-19, as usual in The Orangery overlooking the formal gardens. It’s not a huge space and so this popular event is compact, and this year the 24 CADA member exhibitors will be joined by five guest dealers who are all members of BADA.

All familiar names, they number Peter Bunting Antiques with oak furniture, early portraits and tapestries; silver specialist Mary Cooke Antiques; Joanna Booth, who brings early sculpture, tapestries and Old Master Drawings; historic medal dealer Timothy Millett and Cynthia Walmsley, a specialist in portrait miniatures.

One CADA member also does the fair for the first time: Delomosne & Son, with 18th and 19th century glass and porcelain.

A visit also provides a final chance to see the much-lauded Ai Weiwei at Blenheim Palace, now extended due to popular demand until April 26.

The exhibition opened in October 2014 alongside the launch of the new Blenheim Art Foundation, which will bring a series of shows of the work of Contemporary artists to the palace. It includes more than 50 artworks by the Chinese artist, peppered around the palace and formal gardens.