Garden Wildlife UK

I am afraid I don't know which type this one is.

BFLY1 JPEG WM by John, on Flickr

Those flowers are popular with the butterflies at the moment. Difficult to tell the species, you really need to see the other side of the wings. A lot of the white ones are very similar.

Having said that, looking here
http://www.ukbutterflies.co.uk/index.php
I think it's a Black Veined White.

I know, I know ... it's a rhododendron

[:)

The link Kev posted says the Black-veined White is extinct in the UK so I think it is a Green-veined White which is quite common.
Good well up to the standard we've come to expect.

Thank you very much for the kind comments.

Beautiful photo, johnd

Thank you Nuthatch.