Teal. I think this is an eclipse male. The top photo shows a small pale yellow triangle on the undertail: a female or juvenile would have a white line here. 'Europe's Birds' says eclipse males often have a dark cap and pale cheeks: this bird approaches this. Its belly is pale: 'Collins Bird Guide' says juveniles have darker bellies than adults.
Herring Gull adult. Like the bird posted on 19 August, this bird has moulted its primaries, and no white primary tips are present. However, the new primaries here have grown well past the tail tip, while the primary tips of the 19 August bird were level with the tail tip. (It could be the same bird?)
2 Greylags
Ringed Plover: 2 non-breeding adults. Non-breeding Ringed Plovers lose the black frontal bar above the forehead, while juveniles have pale fringes on the upperpart feathers.
3 white Greylag Geese. The question is, are they leucistic or albino? Collins Bird Guide (2022, Svensson et al): LEUCISM - innate pigment deficiency leading to pale, washed-out colours of the plumage; ALBINISM - innate lack of pigment, usually in the feathers, leading to partly or completely white plumage. So these birds are albino, and the above definition still lets them have coloured legs and bill and orbital ring.
These photos of the Collared Doves support Mick C's comment about their collars. The black of the male's is thicker, with even white margins not seen in the female's. Only the upper edge of the female's collar has a white margin
Collared Doves, with one preening the other. This species is not as common as it used to be
