Had this what I'm pretty happy is a Caspian Gull on the Clwyd just south of railway bridge yesterday. Apologies for delay and quality of pics.
Although its difficult to tell, it appeared to have yellowish legs
Appeared to have quite a Caspo like posture and a stonking bill. Appears to have a beady black eye.
Be nice to hear other opinions....? If anyone in the area, please check. Marine lake also attracting a good number of gulls too