Shown here is a typical wartime spread for sandwiches. Notice that the label says 'Sardines and other fish'. During the war unfamiliar types of fish and meat - including the infamous snoek and whalemeat, were used to eke out supplies. Savoury fish pastes were popular as an inexpensive way to add flavour to a dull diet.
Bread was one of the few products that was freely available during the war, although it was rationed from 1946-48. Even so, our sandwiches would have been made with the 'National Loaf', which many people considered coarse and unappetising on account of its high bran content.