It Aint Half Hot Mum (1974)

Sergeant Major Williams talks the Colonel into letting him take the men from the Concert Party on a jungle survival course. The Sergeant Major thinks everyone is going without food and water, but Solly has arranged for Rangi Ram and the Char Wallah to follow behind with hot tea and food. While the Sergeant Major suffers from hunger and thirst, the men from the Concert Party keep sneaking off to eat and drink.