Thank you for all the informative & encouraging replies: the advice and insights are much appreciated. The frame was a gift from my wife and is intended as a retiral project in the future. In the meantime, I'm trying to learn as much as possible as my knowledge is rudimentary - going on hopeless!

With regard to the questions that have arisen: the stop part is integrated - appears to be brazed in, and on both sides. It's possible that someone neglected to remove them and painted right over them. I found an image of another Wakefield (at the retrobike forum) which has the same braze on feature - I note that it too, has been painted over (interestingly, this frame had been set up with Simplex levers!): 1960 R H Wakefield of Tooting Frame for sale 22" | Retrobike

I've also learned that a 1961 Dutch Locomotief bike had exactly the same braze ons. It does look simliar to the Simplex braze on!

A bike restorer (and former professional mechanic during the 60s) told me that the braze ons are for a Campagnolo 2 x 5 set up. I found the 1003 Gruppo Gran Sport catalogue page at this website to be useful: https://cycling-passion.com/campagno...1953-groupset/ - The downtube braze on looks consistent with the Campagnolo Gran Sport lever design & the dropouts look like the Gran Sport ones too.

Though V-CC dated the frame as mid to late 1950s, the seller suggested it could into the early 1960s. The Classic Lightweights feature on Nervex Professional lugs, with regard to the fishtail headtube, states 'This newer design was certainly in use by 1955...'

Thanks again for the contributions - some beautiful bikes & photos - and I hope I can learn more through further replies and knowledge shared.

Best wishes,
Tom