part blind window? Not sure what that means, but assume the wall starters means just bricking it up and not toothing in? Probably a lot easier, but doesn’t it just end up looking, well, a bit like a bricked in window? End of the day we’re not going to see the outside of the house that often and either way it’s going to stand out.
As for changing bathroom fit out – closing up window is only way of doing what we want as where a shower enclosure fixing would go is bang in the middle of window, so it’s either walk in shower and wet floor or sticking with a bath.
Starting to regret the whole thing…