The economy of the London metropolitan area generates about 30 percent of the UK 's GDP or an estimated 700 billion dollars in 2005 .
Retrieved 12 November 2015London 's gross regional product in 2017 was £430 billion , around a quarter of UK GDP , while the economy of the London metropolitan area—the largest in Europe—generates about 1/3 of the UK 's GDP ( almost $ 700 billion in 2005 ) .
London