Some do, some dont.
The basis of Veteran was originally to make available recordings of music from one area of England; ie East Anglia, mainly Suffolk.
The field recordings John and Katie Howson made included traditional, music hall, stage songs and early pop songs.
There is a book of songs from J's and K's collection called 'Songs Sung in Suffolk'
The book and tapes are excellent in giving a picture of what was still being sung in the area, but not restricted to traditional songs in any way - though others may disagree .
A far more reliable guide to the tradition is to be found in the early Topic Records catalogue (I think this is being indexed on the Musical Traditions website).
Particularly of interest is the 'Voice of The People' series which covers a large time-span.
In The States of course you have the magnificent Library of Congress records, particularly those edited by Lomax, Emrich, Bronson, Seeger, Korson, Botkin, et al.
Jim Carroll