Neat bicycle! I suspect that this, like most other "English" bicycles such as Triumph, Rollfast, Sunbeam, etc., etc., was made by Raleigh. Did you get a close look at the Sturmey-Archer rear hub? In typical British fashion, there should be a date code on it that would likely pin down the vintage...something like 9 49 to indicate September 1949.
Oh, and did you buy it, I hope?
In addition to far too many Triumph cars, I have two Triumph bicyles, one Rollfast, and one Raleigh Sprite with the rare five-speed hub. Yes, I am nuts.