Evans bikes were stock and custom frames built-up and sold by
Evans Cycles (The Cut, Waterloo London). They were made by a variety of English framebuilders. The company is now one of the largest bikeshop multiples and its own-brand models are not custom, just very nice standard midrange bikes.
F.W.Evans founder was a bike journalist/marketeer and touring guru who pretty much invented the English Tourer (drop bars, lots of low gears, plenty of luggage braze-ons) and the bikes are quite
durable.
More archive stuff
here