The economy of the London metropolitan area generates about one-third of the UK 's GDP by almost 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 30 per cent of the UK 's GDP ( or an estimated ~ $ 700 billion in 2005 ) .
London