GDP The United Kingdom is the sixth largest economy in the world and the second largest in Europe after Germany. The Services sector is the most important and accounts for 79 percent to total GDP. The biggest segments within Services are: government, education and health (19 percent of total GDP); real estate (12 percent); professional, scientific and technical activities and administrative and support services (12 percent); wholesale and retail trade (11 percent); and financial and insurance (8 percent). Industry accounts for 21 percent of the GDP and the largest segments within this sector are: manufacturing (10 percent of total GDP) and construction (6 percent). The Agriculture sector accounts for only 1 percent of GDP.