Until perhaps the last thirty years, there was some truth in the belief that north of the River Thames was smart, wealthy and desirable but south of the river was the haunt of thieves, vagabonds and only approached with caution. Even London’s cabbies were reputed to be reluctant to go south of the river at night. Times have changed. Peckham and Brixton as well as Clapham are now achingly trendy and expensive and other areas like East Dulwich and Forest Hill are up and coming.

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.