1. I think the extent of rufous look in range for Blue-tailed based off of images on eBird. Tail shape, with the longer central feathers, all supports Blue-tailed.
2. I can't really help with this one, but it does seem that Kentish Plovers usually have darker legs, and these ones are pretty pale.
3. Strikes me as a Wood Sandpiper
4. First impression was some accipiter, but I can't find a perfect match on eBird...