Bird seen on Hamsptead Heath

Bird seen on Hamsptead Heath

Observation - Bird seen on Hamsptead Heath. Description: I spotted this in some woodland edges on Hampstead Heath, it was probably a bit bigger than a starling (can't be sure though.) I'm sure this is an easy one, but I'm no expert! I thought maybe a juvenile herring gull. But anyone know for sure? Thanks very

I spotted this in some woodland edges on Hampstead Heath, it was probably a bit bigger than a starling (can't be sure though.)
I'm sure this is an easy one, but I'm no expert! I thought maybe a juvenile herring gull. But anyone know for sure? Thanks very much!