Garden Wildlife UK

I wonder if anyone can tell me what bird this is:



Its only a short clip because I didn't see where it was when it came out of the water. Its completely silent and stays under the water for a very long time . It appeared just recently on the local lake. Little moorhen seem to like following it

Quite possibly a Cormorant. My first thought was a Great Crested Grebe but it looks a bit big for one of those.

Thanks Jack , I think yo are right, its a big bird . Its a cool looking bird