The Brexit argument repeatedly exposed a basic confusion in British public life. People spoke of “taking back control” as though parliamentary sovereignty meant that any government, with any majority, could simply obtain whatever result it wished. It cannot. Parliament is legally powerful, but governments remain answerable to elections, party discipline, the courts’ interpretation of legislation, public opinion and the practical limits of administration.
A guide to parliamentary sovereignty therefore needs to distinguish legal theory from political reality. The doctrine remains central to the United Kingdom constitution, yet it has never meant unlimited freedom from consequence. Its value lies partly in its clarity: elected legislators can change the law. Its danger lies in the assumption that a legal power is automatically a wise, legitimate or workable course of action.