From the series Daylight Robbery

Whilst living in London I was taken by the number of blocked out windows in the buildings and often wondered why?

A little research suggested these bricked up windows were a legacy of the window tax that was introduced in 1696 by William III of England and lasted through to about 1851.

The Window Tax required those living in houses with more than six windows to pay a levy, as a result windows were filled in to avoid the levy.

The window tax was referred to as daylight robbery, hence the expression.