Duck ids please

I've got a lot of brushing up to do yet on my duck identification skills and just wondered if anyone could tell me what I have got in the above photograph taken at Oldmoor yesterday - sorry they're not any clearer.

Also I am pretty certain I have a male and female wigeon below but what is the black and white one?  Thanks a lot.

 

 

See my Flickr photos here

https://www.flickr.com/photos/115745582@N04/