1946 Blue Riband Superbe

Blue Riband was Hobbs of Barbican's top-of-the-range bike. Built in 1946, the bike is almost certainly an older restoration given the pop-riveted headbadge, according to the Friends of Hobbs of Barbican Facebook page.
 
Seat tube: 54.5cm
Top tube: 59cm
Head tube: 13.75cm