Lesser Scaup? Tufted Duck or somewhere in between?????

a series of shots of the bird at Hatfield Moors -- its rather approachable, well it approaches you;

but  a few questions --- are the underwing and upperwing patterns quite right? is the bill colour too dark for a first-winter female? is the head shape within the range of variation and also the white on the forehead? I am certainly no expert on these first-winters --
Sorry for all the images but I wanted to cover all angles in case anyone sees something to say 100% yeh or nay to the ID