Catching a Tern Diving

I should preface this piece by saying it is well out of chronology, the images were captured around three weeks ago.
Startop and Marsworth reservoirs normally seem favoured by the Common Tern and they generally swoop and dive, but when John Sentinella and I were at Tringford reservoir recently we saw a single tern as opposed to several, that came and hovered reasonably close by before diving.

On the first occasion it did happen very close, but we were ill prepared and were only able to stand by and watch, but once alerted we spotted the same visitor on more than one occasion thereafter.

Here is a selection of shots from the second encounter. I did not manage to capture the moment of entry and exit from the water, but nevertheless, it is a reasonable sequence that shows this elegant bird in action. In every dive we witnessed the bird was unsuccessful, whereas the swooping technique seen on the other reservoirs seemed more successful.