This is I think this is the common six spot Burnet moth which is day flying. You can see it on a variety of flowers. Here is is on Centaurea scabiosa (Greater Knapweed) but I have seen a good many on Thymus polytrichus (Thyme) at South Stack on Anglesey too. The food plant is supposed to be Lotus corniculatus (Common Bird's-foot-Trefoil) but I have never seen any on this common flower

Breckland, 12th July 2003

Added on November 10th 2004, amended on February 5th 2005, updated 27th June 2008