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It's always good to give an idea of the size of these, as there are other, smaller species (some still quite large) which are very similar and are very common. If the wing venation is not clear, they can be hard to tell apart in a picture.
Pretty sure you are right on this one, though.
My Flickr photos...
Lat/Lng: 53.62959, -2.64469
OS grid ref: SD574149