Arctic Tern

Jimmy gets in from work and asks if I want to go and try for reported Black Tern at K G Reservoir in Chingford.
As always it's a yes, it is only 10 minutes away and Jimmy has a key to get into the Reservoir,so we are soon scanning across the water,but there is not a lot about, so we move further up and start to see Terns flying about, but they seem to be Common Tern, as some of them had landed on the buoys in front of us, we are able to get a photo of them, as we notice one is different to the others, we will check it out when we get home.
Also we see at least 4 Common Sandpiper, 1 Grey Heron, 2 Cormorant, plenty of Great Crested Grebe, & lots of Gulls.
We spend over an hour looking, but Jimmy's in need of his dinner after a hard days work, so it's off home.
Jimmy loads the photo on the computer and it turns out we have seen an  Arctic Tern, which is good as we both needed one for our year list.