The most common gull that poses a problem is the Herring Gull, not only do they congregate and nest along the coast, but also further inland.
They are often to be seen around school playing fields, rubbish tips and landfill sites. They are natural scavengers and will fly up to 30 miles to a known food source. They nest on all types of buildings, often causing building damage, excrement on buildings and pavements, with blocked gutters and gullies from nesting material, causing leaks. During the breeding season April to August they can become aggressive, especially when the chicks are around. Gulls live for about 30 years and always come back to the same nesting site every year. The Greater and Lesser Black Back Gulls are also posing a similar problem.
The Herring Gull is now on the Red Endangered Species list.