Glaucous Gull at North Shields

We have just come back from North Shields Fish Quay to see the glaucous gull. We saw it straight away, it was much lighter than the other gulls. After getting some photos, we went to speak to Mike Hodgson who said it was an Iceland Gull not a glaucous, but birdguides have reported it and said that my photos look like a glaucous gull. I think the beak suggests Glaucous Gull, but the colour suggests Iceland. I think it it a Glaucous Gull but I'm not sure. Help would be appreciated!