B&Q plc, originally known as Block & Quayle, is a British multinational DIY and home improvement retailing company with headquarters in Eastleigh, England, United Kingdom. Founded by Richard Block & David Quayle in 1969, it is now a wholly owned subsidiary of Kingfisher plc.B&Q currently has stores in mainland China, the Republic of Ireland and Taiwan, as well as the United Kingdom. It is the largest DIY retail chain in China and the United Kingdom.