This "Flying Gate" type frameset was seen for sale at a recent bicycle swap meet. The owner didn't know the marque but believed it was from the 1950s. Thanks to Nelson Miller, the frameset has correctly been identified as a Kingsland built by A. Waller in London. Classic Lightweights has a nice write up about Waller and his 2 styles of frames.
photo on - http://www.classiclightweights.co.uk/builders/waller-builders.html
Unique bottom bracket shell that only accepts a cartridge bottom bracket unit. The shell is not threaded and has two tabs.