We only lock the windows in the clear setting for take off & landing outside that passengers have control.
Not true of all the crews!
In the flight I mentioned in the earlier post (TOM536, G-TUIE, BHX-CUN 10th Dec 2014), economy cabin, they were locked to the half level (the appearence is twilight) and the lights dimmed at 1:30PM - Just after the lunch trays were cleared away, and remained that way for 1.5 - 2 hours.
This was at the point where 'Passengers may be able to see Greenland from the right side since the flight path takes us just 100 miles to the south'.
The Steward in charge of the cabin spoke with a noticeable Spanish accent when making announcements.
This is the sort of thing that gets 1 out of 5 on the passenger feedback form.