Shirley Collins:
1959 Sweet England
1960 False True Lovers
1963 Heroes in Love (EP)
1967 The Sweet Primroses
1968 The Power of the True Love Knot
1973 A Favourite Garland
1974 Adieu to Old England
1992 Fountain of Snow
2003 Within Sound (Box Set)
2004 The Classic Collection
Shirley and Dolly Collins:
1969 Anthems in Eden
1970 Love, Death and the Lady
1976 Amaranth (incorporates Anthems in Eden)
1978 For as Many as Will
1979 Harking Back
2006 Snapshots
2008 The Harvest Years
Shirley Collins and the Albion Country Band:
1971 No Roses
The Young Tradition and Shirley and Dolly Collins:
The Holly Bears The Crown (recorded 1969, released 1995)
Shirley Collins and Davy Graham:
1964 Folk Roots, New Routes
Etchingham Steam Band:
1975 Etchingham Steam Band
There's a much more complete discography here.