2cy Baltic Gull Larus (f.) fuscus red "CSI5" at Tara dump 22.6.2010. Foto: Hannu Koskinen

Below another typical "all moulted" fuscus to compare with. Nokia 22.6.2010. Fotos: Hannu Koskinen
These both birds have more rich brown underwings than on average fuscus of this moult pattern do.
Also tendency to broad tailband (looking all dark from distance).