Ahhhh,
But your Smelly Hercules lav is well away from your flight deck, is it not? The VC10 K4 has 2 lavs immediately behind the flight deck door - holy whatsits! No fun when the ground crew team have been consuming unmentionables in some godforsaken hole in the middle east!
The VC10 C1K, with one lav immediately behind the flight deck door, and a load of pongos in the back is not fun either! I should add that the C1K also has 2 lavs and a urinal at the rear of the cabin so there is no escape from the problem at the rear of the aircraft either.