A single silvery chandelier hangs near the far end of the room, gradually illuminating the arched ceiling above as Stuart Armstrong demonstrates its features. "It has uplighting and downlighting, there are a whole variety of effects, so that you can light different areas at a different brightness for different events and at different times of the day," he explains. He speaks with the enthusiasm of a houseproud 21st century Scot reared on a diet of home improvement TV programmes. But the steel chandelier is part of a structure with a far greater history and importance. It hangs in St Giles' Cathedral, launch-pad of the Scottish Reformation where John Knox sparked the religious movement from the pulpit there in 1560.
