Picked up an AD mixte recently. Rode it around the block once, then took it to the laboratory for a going over. Splurged and ordered a Brooks B-springy something or other for it. Also ditching the Simplex drivetrain for Sturmey.
It isn't a 531 frame, but it's not bad. Intend to use it as a back-up to the commuting bike. Or just when I need some extra joy, you know.