As well as the important buildings and monuments, Blue Badge Tourist Guides have to be aware of distinctive characters on the streets of London. None are more distinct than the Pearly Kings and Queens who dress up in the ‘colourful’ costumes and raise money for charity. In fact, a Pearly costume is usually made from black and white materials, with occasionally a brightly coloured scarf (as on this photograph) or feathers adorning a pearly hat or cap.

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.