Many thanks for looking at previous photo (comments and votes really appreciated!)
This is the second picture of (probably) the same butterfly that arrived with hundreds that day in the garden. For some reason I'm now interested in the underwing patterns (some of the previous photos really concentrate on them). It's curiosity, really, the sort of thing I didn't have time for as a busy IT person, parent etc. so it's like growing up again and having a chance to look around. The camera really helps (used in moderation, of course).