@CiaraNi if you have any photos where the tag is legible you may be able to find out this bird’s history.

@CiaraNi Reasonably sure this one is a blacked headed gull in the middle of transitioning between winter and summer plumage or an immature adult. Their heads are only black in summer once they’re breeding age.

@jgrg @CiaraNi we do have lesser black backed gulls (and great black backed - they’re really big) in the UK but they seem not as adjusted to dealing with humans as Herring Gulls.