The sketch is in black and white. A group of WW1 soldiers are crouched in a low trench. Their captain is in front - a large man with a walrus moustache.
CAPTAIN: Right lads. The hun is up there, but here we're perfectly safe, no matter what the swine throw at us.
There is a muffled bang, a slight 'whee' and then a battered wireless radio falls into the trench. The radio begins to play God Save The Queen.
CAPTAIN: No..NO!
The soldiers immediately stand and snap to attention. They are exposed to fire and fall to the ground.
CAPTAIN: You callous bastards. No wonder you're the bad guys.
The captain reaches into a trench, pulls out a large grenade and throws it towards the unseen Germans.
GERMAN VOICE: Ach, gas.
The captain laughs.
CHEERY WIRELESS VOICE: That was God Save The Queen. The weather report now, and we can see that there are strong winds sweeping west..
CAPTAIN: Oh, shit.