www.ukbutterflies.co.uk

Two of these seen on Bathampton Down today. I think they are Narrow-bordered Five-spot Burnets, but both of them appeared to have an extra spot in the centre, giving a total of eleven spots (not all visible in the picture).

http://static.flickr.com/52/172774985_8b214cdda1_o.jpg

It does look like a five spot. The 'spot' in the middle is the red underwing showing through.