h Tony. Just looking in before signing off. That was a super clue. Glad it was solved before I got stuck in to it. Don't think I'd have solved it although it's very clear when you see it.
Unlike you, I'm not a great solver. I'm more of a setter. That's why I admire the folk who come on this site. Solving "cold" cannot be easy.
Andy
Enjoy the hols. Be safe.
Good night
John