Noted a few Med Gull sightings on your blog - we had a single ringed adult at Llyn Coed y Dinas near Welshpool (think this link should work) in the middle of last week for a couple of hours and we're waiting for the BTO to confirm details (the ring type indicates N France or Belgium). Wondering whether any of your birding colleagues had noticed a ring on any of your Meds and whether 'our' white 3OJ9 was among them?
Just idle curiosity!
Mark Wilson