any ideas welcome...
(click on an image for larger view)
UPDATE (31 Oct 2012):
The general consensus of opinion (thank-you to all those who emailed me) seems to be that this is either a Shy Albatross (Thalassarche cauta) or White-capped Albatross (Thalassarche steadi) with most suggesting that it is difficult to distinguish between them, particularly in immature birds, but there's a leaning towards T. steadi so I'm labelling this post that way for the moment. I am happy to take further suggestions/advice and will update this post accordingly if I get further evidence/argument to change this position.