Replying to this cold topic as the OP's photos were taken at a similar time of year.
Spotted a similar bird just now (14 Jan 2025) about 50m offshore from a beach near Oban.
It's clearly an Eider from the bill shape, not to mention the association with the rest of the flock!
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The second shot includes several female and you can see their wing specula are very clear - unlike the bird in question, so I assume said bird is a male. Ignore the gull shadowing in the hope of mobbing a meal!
View attachment 1623084
My assumption is a first winter male.
What does everyone think?
Cheers,
ChesterMan