He does all the major orchestral works, plus The Dream of Gerontius, specifically:
Symphonies 1 and 2, Enigma, Falstaff, Cello Concerto (w/ duPre, natrually), Sea Pictures (w/Baker), Introduction and Allegro, Serenade for Strings, Cockaigne, Froissart, Pomp and Circumstance, and a couple of short pieces that were on the English String Music disc (Elegy and Sospiri). These are all among his best recordings so if you want Barbirolli's Elgar, this is a great way to get it. Both this and the Vaughan Williams box are really intelligently put together.
Dave H