Ancestry blog post on London City Directories

Coincidence or not, following Findmypast's release of additional British city directories Ancestry posted on their blog about their collection of London directories.
The gem of the collection is the London Post Office Directory from 1801 to 1943 with never more than three consecutive years missing in the sequence. The years ending in 0 and 5 are OCRd, the remainder are images for browsing.