Gulls are all in winter non-breeding colours at this time of year.
The Common gull looks like a small, version of the herring gull I do not see them in great numbers in my local area however the odd ones I do see are always close or within flocks of Black-headed gulls
These noisy small gulls are the most abundant gull in my local area. They are always on the lookout for an easy meal. Humans are an easy touch for a meal.