Sacha wrote:
If it /is/ that one, it appears to be a cinnabar moth:
http://www.butterfly-conservation.or...tures=&Family=

That's

beautiful. I've never seen one before in the flesh but hope they'll
visit us one day. I saw a pic the other day of a gorgeous moth (we
think) with a bright scarlet 'tail' and navy wings with white splodges.
If I can find the pic again, I'll give a link to it.

There is an identification guide on that website:
http://www.butterfly-conservation.org/