Central to Barratt's expansion was its high-profile marketing, with national advertising, featuring Patrick Allen and a helicopter. Barratt provided starter homes for the first-time buyer and offered part-exchange to those trading up. In the year to June 1983, Barratt sold a record 16,500 houses making it by far the largest housebuilder in the country. In 1983 and 1984 Barratt was hit by two successive ITV "World in Action" programmes, the first criticising timber-framed housing and the latter, starter homes. Within two years, unit sales had more than halved. Lawrie Barratt led a total restructuring of the company, abandoning timber-framed construction, launching a new product range, and concentrating on the more profitable trade-up market. In the late 1980s, Margaret Thatcher famously purchased a house on one of Barratt's most upmarket estates, in Dulwich, London.