Medieval historian Dr Janina Ramirez looks back to a time when British craftsmen and their patrons created a new form of architecture. The art and architecture of France would dominate England for much of the medieval age. Yet British stone masons and builders would make Gothic architecture their own, inventing a national style for the first time - Perpendicular Gothic - and giving Britain a patriotic backdrop to suit its new ambitions of chivalry and power. From a grand debut at Gloucester Cathedral to commemorate a murdered king to its final glorious flowering at King's College Chapel in Cambridge, the Perpendicular age was Britain's finest.