I am pretty certain your frame is a 531c Raleigh Road Ace that has been painted yellow later on. It looks identical to my one from 1987. Can you make out Shimano 600 on the crank? Here's some other links that might help...
http://cycleseven.org/raleigh-roadace-shimano-600...
Re: chas roberts 5 speed sturmey archer tourer-better pics added
Hello,
If this bike is still for sale, could you tell me
1. how long the top tube is from centre of seat tube to centre of head tube?
2. are the wheels 700 c or 27 inch?
Stuart