OY-JRK Airbus A320 Danish Air Transport on SAS805 during its first visit as such previously with Adria as S5-AAS and many others prior to that, you can't miss the registration.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/26104073@N06">John Taggart</a> from Sunbury on Thames, Middlesex
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/tagsplanepics-lhr/16767005580/">OY-JRK27032015LHR</a>