This is a Swallowtail Butterfly, but it is not the species that is native to the British Isles. It does look quite similar but is different, so if there is anyone out there who can actually identify the species, I would be grateful. It is in the local Butterfly House.
Well I love a challenge......the nearest I could find was Macleay's swallowtail butterfly from Australia I think. Have a Google and see what you think....a beautiful creature. :-)