I am sat next to a couple of copies of the Francis & Day's Community Song Album songbooks. Each contains about 30 songs Including "popular" music hall and folk. No date on them, but these were priced at 1 shilling and sixpence. The colour of the paper suggests this copy was 1950's.
To quote the cover - "With full words, music, tonic sol-fa & ukelele arrangement". There was not even a mention of guitar when these were printed.
If you look at popular recorded music in England, the guitar didn't really get popular until mid 1960's. Pete Townsend learned by playing his father's banjo before guitars started to be popular in pop music.
Quack!
GtD.