Another 'just nipped out to pick up my nocmig recorder and had a look out to sea' bonus - not quite a White-billed Diver, but still a pleasure: 20+ Bottlenose Dolphins heading south off North Cliff a while ago, and while the light was crap for photos, there's a few animals identifiable thanks to their dorsal fins.....
... including Runny Paint, an old female from the eastern Scottish population who we first saw off Flamborough Head in 2013, and have seen multiple times off Filey in recent years.