Thanks .
It does seem to match what I have got . I was beginning to wonder if it wasn't a Severn Valley as the old catalogues refer to a different style of bike . A touring bike with a longer wheelbase with mudguards . Mine has a short wheelbase of 39 inches and without mudguard mounting eyelets .
The SV started life as the 2nd in line in the catalogue hierarchy. The Tour of Britain model being the premium Viking bike of the early 1950’s. Around 1955 Viking discontinued the ToB and the SV became the top of the line bike. They changed the plainer lugs used on the earlier SV to the Nervex lugs that had been used on the ToB.
It was a full on race bike and went on to have many successful victories with riders such as Ian Steel and Brian Haskell. The bike was available with or without mudguard eyelets. As one bike did all, many had the eyelets so they could fit mudguards when training in inclement weather.
I’ve acquired a late 50’s SV frame - trying to establish exact date but I think it’s 1957 or 1958. Serial number is V1198. Interestingly it has 119 stamped on the BB shell and on the fork steerer column.
Your bike I believe is pretty much unchanged from the early Wolverhampton built bikes. Changes to lugs, BB shell and dropouts, rear brake bridge and braze ons for shifter levers and cables. I think geometry and it being built throughout from Reynolds double butted 531 tubing is in keeping with the original bike.