He has also announced plans to open an Islamic Index of companies and cash in on a sector that has seen a 150% increase in investments over the past seven years and is estimated to be soon worth £1.3 trillion.

Deputy mayor Edward Lister outlines why London is a good place for Islamic investors; Azeemeh Zaheer explains how it would work while Emran Mian from Social Market Foundation says the system has to have a complex structure so that no interest can be made – something which goes against Sharia Law.

Watch Video: http://www.bbc.co.uk/news/uk-england-london-24732883