This was the site of what used to be a “lunatic asylum” (not a description we tend to use these days) at the turn of the 20th century, and which was latterly converted to an NHS hospital. The hospital was closed in the 1990s with many of the buildings being demolished. A few, like the one shown, remained for several years.
Although those that remained were so-called “listed” buildings (to remain for posterity on account of their architectural qualities), the local council allowed them to fall into disrepair to the extent that demolition was permissable on the grounds of “health and safety” .. the (regrettable) normal ploy in these circumstances.
Since this shot was taken, the building shown has been demolished and site has been completely cleared for a new housing estate.