Unlike in the United States, where the Constitution was written down by the Founding Fathers nearly 250 years ago and is regarded as sacrosanct by many Americans, the British Constitution has never been formally inscribed but instead has evolved over centuries. The Supreme Court in Parliament Square can only decide if the government has acted within the law as it stands and cannot decide what that law should be. The Court does not have the power to overrule the politicians who sit in the Palace of Westminster opposite. Parliament always has the ultimate authority under the British system.

On a briskly cold January morning, fellow Blue Badge Tourist Guide Steven Szymanski inducted an enthusiastic group into his passion for bridges on a walk that took in Tower Bridge to Waterloo, via St Magnus Martyr, the Steelyard and Bankside.