From Willem Pijper exist already quite a few works on CD. (a.o. the Donemus and NM labels). It seems though that the first symphony is not available on cd. I have it on lp and will digitize and post this one.
Elroel
I agree that most of Pijper's fairly small orchestral output can be obtained on disc (although I don't have a copy of the Cello Concerto......you don't happen to have an uploadable version do you ??? ;D) but it is scattered about on difficult to obtain labels. But I do think that he was a composer who definitely merits an integrated set....and his purely orchestral compositions are almost all quite short so they would fit onto a couple of discs :)