On Sunday, I spent an hour at Clumber and an hour at Rufford, checking the Black-headed Gulls.
Although there were several hundreds gulls at Clumber (mostly Black-headed, but also Common and Herring) I only managed to spot one ringed bird, 208B. As it turned out, this bird was a new one for me, and this sighting was the first since being ringed, at Center Parcs, on 15th January 2022, as an adult bird. As you can see, it's in full breeding plumage, and looking very smart!