Thank you everyone, they look very similar to my eye so I’m satisfied that it was one of the two!
One of the more exotic visitors to our allotment! We’ll continue searching for a white admiral...

Cat

Wow yes that looks like it! My other half took a shaky video too and we caught this still from it, which also seems to match.

Would it be possible for it to be blown to the UK do you think? Or perhaps an escapee from a collection?

Thanks very much,
Cat

We spotted this butterfly a few days ago at our allotment in Bristol, can anyone help with an id? The wings looked black and white and possibly striped in flight but it was too shy to show them for the picture! It looks a little like a white admiral from my books, but the pattern doesn’t look quite ...