Having completed the children's party I checked Orkbird, "Bearded Seal showing at noon."
Arriving at the spot a seal was behaving oddly just off the school. Long whiskers were obvious and it had a small squashed up face. We watched it for half an hour and I varied between "this must be it" to much doubt. Another observer was confident but I was persistent and in the end when the animal finally stopped bobbing up and down (a characteristic apparently) and swam over to the slip it revealed itself as Common Seal. Darn it!