White winged tern

I was enjoying good views of the the tern today after work at Rainham Marshes for ten minutes at 4.30pm when a peregrine decided to have a go at the tern, it made two VERY close attempts in catching it only centimeters away even at one stage the tern was under the waters surface trying to escape.The tern then went towards the river and was lost to view.It was one of those open jaw moments.Here is a distant record shot.