Mysterious butterfly

Observation - Mysterious butterfly - UK and Ireland. Description: Butterfly, solidly poppy-red wings apart from two small black spots in the middle of the top wings. 3-4cm wing span. Rounded wing edges. I'm as sure as I possibly can be it wasn't a Burnett moth; wrong wing shape and not enough black. Any ideas?! I'm stum

Butterfly, solidly poppy-red wings apart from two small black spots in the middle of the top wings. 3-4cm wing span. Rounded wing edges. I'm as sure as I possibly can be it wasn't a Burnett moth; wrong wing shape and not enough black. Any ideas?! I'm stumped! Sorry, no photo...