Went on a boat trip along the river Crouch (24/11/18) along near Wallasea Island last year. Had as we left the Marina some Little Grebes, we did think that they may have been Black Necked but where too small.
Cormorant sitting on post.
Had a flock of Avocet flying in front of us.
There was also several seals swimming around the boat and managed to get a few photos.
It was a cold day out on the river, although it was good to see the seals so close to the boat.