To Roberto's fine list I would add:

English Street Songs - Lloyd
English Drinking Songs - Lloyd
Bad Lads and Hard Cases    MacColl

These were my introduction to English folk song. I have them on very ancient Riverside LPs and do not know if they have been reissued on CD.

PeterT - Read Lloyd's book "Folksong in England." It's out of print but reading copies usually can be found at bookfinder.com. Also read Lloyd's notes on many albums of his and MacColl's; they are a goldmine of information and background on the songs and their sources -- Tom