Olympus Key Med based in Southend, Essex asked us to control Herring gulls and Feral pigeons at 3 of their buildings on a Southend industrial estate, Herring gulls proved to be the most stubborn pest here, but our Falcons were flown on the rooftops and our Harris hawks controlled the pigeons on the main building, Control proved effective with Gulls ceasing to nest on the roofs.