There were several Albion band line-ups during the 1970s; the first, called The Albion Country Band, accompanied Shirley Collins on her 1971 album "No Roses". A further three albums, Albion Country Band - "Battle of the Field"(recorded 1973 but not released until 1976)--- The Albion Dance Band - "The Prospect Before Us"(1976) --- The Albion Band - "Rise Up Like The Sun"(1978)were released. However, in more recent years, two CD compilations of archive live material from these same Albion line-ups have been published(although "Live at the Cambridge Folk Festival" also has material from 1987).
"The BBC Sessions" consists of live sets comprising tracks from all three of the original studio albums, performed by the various line-ups and at around the same time as each of the original studio albums were recorded, so the playing is tight and confident at all times; plus there are some other great tracks that had not appeared on any of the original albums.
I think that the recordings on the BBC Sessions album are superior to the studio versions. The instrumental numbers, in particular, are livelier and more robust.
If you only ever buy one Albion Band CD, "The BBC Sessions" is definitely the one to get, in terms of sheer quality, and quantity. Don`t be put off by the fact that it`s live, either, as each and every track on the album is performed faultlessly and the sound quality is excellent throughout; there`s also the added bonus of the previously unreleased tracks.