Request help to id baby gull species Jersey, Channel Islands (1 Viewer)

Dear colleagues
The heading says it all really.
The photo was taken a few years ago. I guess it might be a Herring Gull or a Lesser Black Backed Gull or something similar, but am not sure.
Please does anyone know which species this would be.
Best wishes

Sorry for forgetting to attach the photograph

Sorry you didn't get a reply earlier. Nestling LBB/Herring gulls(/Caspian/Yellow-legged etc.) are almost impossible to ID in mixed colonies: Chicks are mobile around the colony very quickly and ringers marking chicks in said colonies often simply record the majority species present. I can tell you that the brown tone to the mature feathers showing through the downy fluff should rule out Great Black-backed Gulls, who are very much monochrome. Other than that you're relying on identifying the adult birds around the chicks.