I have managed to restitch the binding - I included it into the batting, so I don't have to quilt it (cheater!!), but I neglected to continue my stitching all the way to the end, so have had to add a bit of topstitching to make it feel complete from the back.
Machine stitched from the front, hand stictched around from the back. Wrist a bit sore today after a marathon session, but at least I could catch up on some telly while I was busy!!