Saw this one way out at about twice the distance of the Jetty length hence the poor quality images. I have cropped them at 5 times original size. I thought at first a Little Auk then when I examined the photos closer, thought that it was a Common Guillemot but it does not fit perfectly. Could it be a Brunnich's Guillemot? Can someone confirm which it is?
Common Guillemot.
Many Thanks Keith