This is the age of Jane Austen and the Romantic poets; the paintings of John Constable and the gardens of Humphry Repton; the sartorial elegance of Beau Brummell and the poetic licence of Lord Byron; Britain's military triumphs at Trafalgar and Waterloo; the threat of revolution and the Peterloo massacre. In the latest volume of his celebrated series of Time Traveller's Guides, Ian Mortimer turns to what is arguably the most-loved period in British history -