I thought that it might have been an East Tern Airliner but the colors are wrong and I believe that that species has been extinct for several decades. Perhaps others can help...
BIRDS AS ART Blog: great info and lessons, lots of images with our legendary BAA educational Captions; we will not sell you junk. 30+ years of long lens experience/e-mail with gear questions.
BIRDS AS ART Online Store: we will not sell you junk. 35 years of long lens experience. Please e-mail with gear questions.
Check out the new SONY e-Guide and videos that I did with Patrick Sparkman here. Ten percent discount for BPN members,