A heavily cropped shot gives a blurry picture but you can see the distinctive yellow and black bill pattern - the yellow coming down to a point. (By comparison, the Bewick's Swan has a smaller and more rounded area of yellow on its black bill and our native Mute Swan has an orange and black bill, with a black nob on top, just in case anybody was wondering)
As a teenager, I spent many hours as a voluntary warden at Welney Wildfowl Trust reserve in Norfolk, a 6 mile bike ride from Littleport, where I spent the first 21 years of my life. Many hundreds of Whooper and Bewick's Swans would over-winter there (they still do but in smaller numbers) and I loved watching them come in off the fields at dusk to eat the grain put out for them by the warden, my childhood hero, Josh Scott. The birds were so accustomed to him that he could walk along the flood-lit water's edge with a wheelbarrow full of grain and these completely wild arctic birds would gather round and eat.