Wetland bird ID

I'm back with more birds... wetland birds again (they aren't my strong point). And this time, I made the effort to upload them onto my computer rather than just taking a picture of my camera lol. The pictures are still awful though. Seen at Blacktoft Sands on Sunday.

 

1. Female garganeys or just mallards?

2. Common sandpiper or some other sandpiper? (featuring yellow wagtail).

3. (Excuse the godwits/avocets etc.) Don't think I've seen this bird before. I was thinking dunlin. It surely can't be a curlew sandpiper, I don't possess the kind of luck to see such a bird.

4. Common redshank? There were loads of redshanks about, this one just looked a bit different and it's bill looks almost widened at the tip.

5. Dunno. I have thoughts but I'm so confused. Again, bill looks widened at the tip.

Apologies for the rubbish photos. I may have garnered the effort to upload the photos but not to tart them up!