Sir George Cayley 1773-1857 scientist and pioneer of aviation lived here

Nick Harrison on Flickr
Simon Harriyott on Flickr
Spudgun67 on Flickr
Nick Harrison on Flickr
Nick Harrison on Flickr
Nick Harrison on Flickr

20 Hertford Street, Westminster, W1, London
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by London County Council in 1962

Colour: blue

Wikimedia:

Flickr:

See also...
Chris Hall on Geograph
Jez Nicholson on Flickr
Chris Hall on Geograph