It was eventually seen flying sorties in the company of Common Tern. It's behaviour was very similar to Little Gull, a graceful undulating flight that made it a little easier to pick out. The grey wings and mantle with white leading edges were obvious against the strong light as it flew out toward the pumping station.
Unfortunately it never did settle, but there were four Black Tern there.
Before heading away, a Nightingale was bursting into song intermittently. It's a sound that you can never tire of.
I then headed over to Fingringhoe Wick EWT reserve. This was my first visit here and I was really impressed with it. Around six Nightingale were heard including one briefly seen.
A Red-Footed Falcon was then reported from Vange Marsh RSPB so I hot-footed it down there to see this amazing bird and the fourth I have seen in the UK.