Am I missing something here?
Apart from the forks looks all Raleigh to me - someone got carried away with the 531 decals - one of them's a Taylor!
Seller makes a point about the rear triangle...it's all Raleigh, brake bridge, seat stay caps...
Not sure the Royal* was 531 throughout either.
*or all Royals
N.B post edited to include additional info
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.