Auction introduction: Our flagship sale of Modern British & Irish Art Evening Auction headlines Sotheby's British & Irish Art week, comprising a dynamic series of sales and events celebrating the artistic landscape of Britain and Ireland from the 19th to the 21st century. Our Modern & British Art Evening Auction brings together some of the greatest artists working in Britain and Ireland in the 20th century, and of which many are emerging from long held private collections or are making their auction debuts.