Answer:
Many laws set practical standards for weights and measures in the British Parliament such as the weights and measures acts, which determine and enforce the unit of measurement for weight;
the "Pound", equivalent to 16 ounces, is used to measure several things such as food, people, animals, with the sign "Lb" (from the Latin: Libra), and albeit it has the same name, when it come to the currency, the "pound sterling" gets the (£) symbol for the sake of disambiguation.
Thus that's why "buying one pound of bread" is part of the standards for weights and measures.
Explanation:
