Source G is a page from a government booklet, published in 1917 – during WWI. This makes it useful because it is coming from the group of people who will be making an impact on the daily lives of Britons, and its publication also makes it very useful as it neared the end of the war. However, it is important to note that it is only talking about WWI and only one specific impact on daily life, food and rationing. The British government had to cut down on the amount of food it brought in from abroad as German submarines started attacking British supply ships. The rationing programme made sure that community received an equal amount of food every week. We can rely on the source because it is from the government; it is coming from the group of people
