Tight Turning Tern

We called into the Pier at Sullom Voe Oil Terminal to change out some crew. Lots of Terns nesting at the edge of the car park by the Jetty. You did not have to go far before they would be screeching and dive bombing you...

Pretty sure this one is an Arctic Tern. there were Common Terns as well so it could be one of them... hard to tell at this angle