Dead bird on Wirral beach ID?

Yes, Gannet.

Regarding colouring - it could just be dishevelled or possibly a juvenile.

Thankyou, yes oil would make sense.

You can tell it's a gannet by the beak shape, pointed, hooked and with a black line at the top

It's a Gannet as already said but just warning about dead birds and Avian Flu. People need to be very cautious about touching dead birds and maybe report them to DEFRA who will collect them, phone number 03459335577