The Georgians loved any excuse for a bash. Well, that’s the impression you get from a charming exhibition, Georgian Illuminations, at the Sir John Soane Museum in Lincoln’s Inn Fields which opens this week. For a country constantly at war the outbreak of peace in 1814 would have given good cause for celebration. And having a mad monarch in King George III, his recovery to lucidity was worth a party too. On party nights London was bright with fire, fireworks, lights and banners. Those people knew how to party.