Look at this on eBay http://www.ebay.co.uk/itm/111989118144
Very similar to this... Seat stays are slightly shorter than mine & pump pegs are on different tube (but 'offset' like mine) & unfortunately... its not 531....
I bought it in Leek staffs... Although who's to say that it didn't live at the above postcode once upon a time!
Believe me I've been through classic lightweights amongst soooooo many other sites & I just can't nail it was just hoping that someone on here might recognise it ...I'm assuming it's...
Bought this a few weeks ago ...the seller had no idea ot what it was ..my immediate thought from the colour was a Dawes galaxy but the bike has obviously been resprayed.
It has cyclo benelux rear dropouts with a deraileur hanger & was originally a 10?.speed from the brazed on twin Benelux...