What a lovely post. I've never managed a lesson with Geoff Billington but I've watched a couple of his demos and he has a lovely sense of humour. You can see he's a natural people person so I can imagine he's a great instructor.
I ran a clinic with him last year and will again. Easy to dal with - gave everyone a good lesson and could actually weigh up combos quickly and change his lessons for each group. He was a lot better teacher than I thought he would be - I knew he would be fun.
I had a lesson with him back in September he was fantastic! Treated everyone as equals regardless of experience or how fancy their horses were. Really enjoyed it and learnt a lot! Glad your daughter did too