Bangladesh - Cox's Bazar (1 Viewer)

Hello,
I was along the shore at a spot where there is a sand spit of land which becomes more or less connected to rest of the shore depending on tide. This is my first best morning to go birding since COVID-19 first started to cause movement restrictions months ago.
I certainly saw two plovers. I think these are Lesser Sand Plovers, but I have not ID'd this species before, so I not too confident. As well I got a couple of not great views of a couple of other shore birds. My impression is perhaps a Sanderling, and another (Green Sandpiper???). Also was a pair of wagtails. One is definately (in my mind at least) a White-wagtail, of some sub-species, but the second wagtail was white and grey with no black. Is this a female? or is it another species?
It was a nice morning, but I don't have any good grasp of any of the birds in this part of the world. So if anyone can assist or point me in direction on confirming these ID's, I appreciate it.

Common sandpiper, White wagtail (split as Amur leucopsis I think) and a Sand-plover species - not sure if Lesser or Greater from this photo.

dwatsonbirder said:

Common sandpiper, White wagtail (split as Amur leucopsis I think) and a Sand-plover species - not sure if Lesser or Greater from this photo.

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thank you Daniel, I will upload another shot of the Sand Plover, not sure if this assists at all in differentiating between the two

Greater for me

Larry Sweetland said:

Greater for me

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And me.

dwatsonbirder said:

..., White wagtail (split as Amur leucopsis I think) and ....

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Still a subspecies Motacilla alba leucopsis in IOC (and I think in all the main taxonomy authors) :t:

Thanks so very much, everyone, for the thoughts on these.
z.