Lots of supposedly coastal birds are often distributed inland. Many waders, which I expect to see out on the mudflats off Southend, and have a twice-daily commute to avoid the incoming tide, can also be found high in the pennines. It's really weird to me to hear a curlew or an oystercatcher 1500 feet up in the pennines. But they live, and nest, there.
Gulls likewise. They follow trawlers and tractors with equal willingness. I think the noisiest gulls I've heard were the herring gulls that roosted atop Cheltenham Ladies' College when I stayed there for a summer school about 20 years ago. The Manglement of a nearby hotel had placed an enormous plastic model of an eagle owl on their roof in an attempt to scare off the gulls, but it had the opposite effect: they dive-bombed it with loud cries as they did so. Mind you, it didn't half look impressive when you saw it silhouetted against the sunset. Several of us were convinced it was a real one for about half a day, which led to much excitement amongst the Hungarian ladies who were teaching our course.