Harry Potter's magical effect 'worth £4bn to London'

The Harry Potter franchise is worth about £4bn to the London's economy, according to the London School of Economics (LSE).

Leadenhall Market and King's Cross station routinely attract fans looking to reminisce over scenes from the films.

LSE Professor Amitav Chakravarti said he did not see the strength of the Potter pound dwindling any time soon due to the popularity of tourist attractions such as the West End play, Harry Potter and the Cursed Child.