You failed to mention visiting times at WS - is it still in this 24hr airline only Mon to Fri and when staff not doing Pilates/ getting hair done/ banking/ shopping in Waitrose/staring out over the lake...and thats of course if they are not working from home.
I dare say they feel that achieving 2hrs rest each on a 7hr sector may not be considered full time employment as well. (last week, and full since you're bound to ask)