Philip Mould is is a London-based art dealer with a gallery in Pall Mall specialising in 500 years of British art. Valeria Vallucci is a researcher at Philip Mould & Company specialising in provenance and Old Masters from 17th century to early 19th century. Tabitha Barber is Curator of British Art, 1500-1750, at Tate Britain. Helen Draper is a professional easel paintings conservator, art historian specialising in 17thcentury British portraiture and expert on Mary Beale.