We very rarely get stray Monarchs in the UK, nearly always in the south-west, where we live. About 20 years ago, one turned up in our friends' garden, right by the sea. I took a very fuzzy photo of it (way before the era of smartphones with amazing cameras...) and I sent it to our regional daily paper (the Western Morning News) and they printed it! We don't have the Monarch milkweed food plant here so the strays are doomed, but it's inspiring to think that they've made it all this way and can still flutter. The last Monarch I saw was in Madeira four years ago. I have a lovely photo of it. It was another stray, of course. Monarchs are amazing...