Thankyou all! I had googled the quilt but did not find the link to the Free Spirit pattern....sometimes it is hard to match quilts via online photos, non?
I also found that the quilt "Green Diamonds" is identical (?), and the pattern for that is in Kaffe Fasset's "Quilts in Ireland" book (2017).
Yes, a lot of bias but agreed that heavy starching will keep that under control. I love the wonderful colour shifts possible in this quilt!