This is Regent Street as seen from Piccadilly Circus.
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Regent Street is a major shopping street and thoroughfare in London’s West End. Prince Regent (later George IV), it was built by John Nash.
The street still belongs to The Crown Estate, which keeps its offices adjacent to the street.
Nash planned a wide boulevard with a sweeping curve. The optimum use of pockets of Crown Estate land meant that the New Street (as Regent Street was initially known) contained a number of twists; where Portland Place joins Langham Place, and where the street enters Piccadilly Circus. The street was completed in 1825 and was an early example of town planning in England: until this point, London had grown somewhat randomly. Nash saw New Street as a clear dividing line between Soho, which was considered less than respectable, and the fashionable squares and streets of Mayfair.
Source: en.wikipedia.org/wiki/Regent_Street
