GBBG or LBBG?

GBBG or LBBG?

Observation - GBBG or LBBG?. Description: Not sure if this is a Great Black-backed Gull or a Lesser Black-backed Gull? I have included the Cormorant for scale!

Not sure if this is a Great Black-backed Gull or a Lesser Black-backed Gull? I have included the Cormorant for scale!