It's been resprayed so I can't be certain, but here's what I know for sure:
It's definitely a Raleigh
It was definitely built in Worksop in 1984
It has cantilever mounts
The seller told me he's sure it's a Randonneur because it was the only Raleigh for sale in 1984 with cantilever mounts, which, as far as I can tell, is true. He could be wrong, or the canti mounts and canti cable stop could've been added later.
Either way I'm not particularly bothered. It's a 531ST frame with fast touring geometry in my ideal size, with canti and rack mounts. I'm not building it up as an all-original-spec Randonneur anyway, so if it turns out to be something else then I won't be disappointed.
Definitely not built in Woksop in 1984, Worksop factory closed in 1980. Raleigh continued using the"W"prefix on frame numbers though...Randonneur second half of 1980s at the earliest.
Co-founder of a V-CC section, member South Eastern Road Club and owner of - 2005 Bianchi Reparto Corse (modern), 1985 Raleigh SBDU Pro Super, 1984 Raleigh LU Corsa, 1980 Allin Stan Butler Special, 1978 Ron Cooper, 1975 Bill Philbrook tourer, 2 x very early Roberts (mid/late 1960s), 1966 Raleigh Superbe Roadster, 1964 Allin Stan Butler Special Belgique, 1951 Hobbs of Barbican S/C, 1950 Hobbs of Barbican S/C, 1947 Hetchins Super Special, 1908 Centaur Featherweight. 1988 Specialized Stumpjumper.