A few weeks back I was flying on a Monarch A300-600 from LGW to LCA. I was sitting at seat 5G, and I went to the toilet about half way through the flight, and headed towards the front toilets, with those being closest. The one on the right hand side of the aircraft was occupied. The cabin crew were having a break, so I said excuse me to them and squeezed passed to head towards the left hand toilet, situated just before the flight deck. One of them then said 'You're not meant to use that toilet, but we'll make a quick exception this time.' This was the first I had heard of this (not mentioned in safety brief etc.) They offered no explanation as to why, but to be fair I didn't ask. My only guess what this is a toilet reserved for crew (with it being just outside the flight deck). Or is there another reason?
Thanks for your replies,