The moth in this picture isn’t particularly exciting, it’s just a rather scruffy Pyrausta aurata, sometimes called the mint moth. Mint is one of their foodplants, but so are its relatives like the oregano (or is that marjoram?) in the picture:
I didn’t get a picture of my exciting moth, which was a Jersey Tiger. Exciting not just because it’s a spectacular species, but because as far as I knew, in the UK it’s only confined to Devon. Which would make mine a rare vagrant. Anyway, a quick bit of Google reveals that a couple of years ago, the big news among the UK moth community was the discovery of a colony of Jersey Tigers in south London. No-one’s sure if they got here under their own steam or if someone accidentally introduced them; either way it makes my sighting slightly less remarkable. Still neat though.