Photograph 1: A Warbler of some sort. I was thinking a Willow Warbler?
Photograph 2: Some sort of Sandpiper I think, just a Common one?
Photograph 3: Two interesting birds. I have no idea what they are.
Photograph 4: Some sort of Gull. I thought Black-Headed but am now drawn towards Little Gull, which were recently seen at the same location.
Sorry about the poor quality of a couple of photos!