Peter Hammill question

[Pete Conkerton]

 Dunno why it's taken me so long to notice, but the Peter Hammill Peel Sessions cd includes 4 tracks dated 04-12-88. Ken's bible only lists sessions up to 1979. So, is it (perish the thought) a KG omission, or were they recorded for someone else?
I'd check with In Session Tonight but I can't find my copy and, worryingly, I haven't seen it since I moved house. Oo-er...
Cheers aye,
Pete