Spent a very enjoyable 3 years at Chivenor when it reopened in the early 80s and managed to get 5 trips in Hawks - still remember them like it was yesterday. Didn't need the sick bags - although I always got out feeling tired and the worse for wear - nothing like the first few lungfuls of fresh air when the canopy opens! My best mate at the time managed many hours in the back seat - over 100 I recall - and he regularly threw up - even taxying out! I heard that they stopped at the holding point and had the caravan controller collect a sick bag from him before they took off! Wasn't there for that one, so can't confirm - but hey, never let the truth get in the way of a good story!
He never let the sick bags get in the way of his ambition though - and he now holds a senior position as a training captain with a UK airline - despite the RAF telling him he would never make it as aircrew!