Very nice bike Graham , it is always a hard question ,how far do you go in the restoration of bike . I have a 1925 ,250 Raleigh . It is original ,I dont ride it much now ,but I just wipe it over with an ''Oily Rag'' [ thats a plug for your magazine jayvee].
I visited a friend who has so many bikes ,he collects Veterans ,starts from the frame and works his way through ,he has bikes that I have never heard of .