Sadly, with trips to Preston Docks and Fleetwood Marine Lakes in the past week or so, It is pretty obvious that gulls have not coped especially well in the recent cold spell. I'm intrigued to why this is however as it isn't as though as the locations stated are food heaven for gulls as there is almost a constant supply of food. Perhaps the cold weather has caused the birds to gorge on white bread and salty chips and that has killed them? It's never nice to see a dead bird, but this 3rd winter Herring Gull was interesting to watch as it clearly died only a few days ago meaning it was pristine.
Update - BX4 has been present for over a year according to Jonathon Scragg. I have also discovered that the Whooper Swan was also photographer with a metal ring by Mike Watson. Maybe this will produce some interesting data.