When rescuing Pike from the boggy ground, Captain Mainwaring orders his men to remove their trousers but does not do so himself. This was due to a special clause which Arthur Lowe had put into his contract, in which he refused to be seen on-screen without trousers.
Wilson comments that The Jazz Singer (1927) was released twelve years ago, dating the events of this edition to around 1939/40. This can be further clarified by the parade, which is marking the start of Walmington's RAF Spitfire Fund week. This initiative was launched by Lord Beaverbrook at the end of June 1940.
From this episode onward, the Home Guard are depicted wearing full battledress uniforms made of woollen serge, rather than the green denim uniforms they had worn up to this point. This reflects the experience of the real Home Guard during the war, who were originally issued with green denim, which was cheaper and easier to produce than woollen serge. Having the cast in battledress meant there was also a need to create formation badges to attach to it, making this the first appearance of the "Home Guard" tabs and "CP1" arm badges sewn onto the upper arms of the battledress tunic.
Wouldn't common sense suggest that private Sponge who is a farmer and owns the ram catch it.