There are some very negative reviews on this book, both in Great Britain and the U.S....well what can I say? If you are---or consider yourself---a historian of the era, of course you're going to be fixated on the minutae of it.
The point is, I loved the book. It gave me the best overview of that brief period, a time best compared to the "roaring 20's" or the 1960's in being a really unique time when anything went, and all the old mores of society were out the window. Just as in the 1920's, when post WWI women cut their short for first time, in Regency England young men and women, in the upheaval post-French Revolution, did away with hair powder and the heavy weighted velvets and laces, jewels, face paint, beauty spots, and wigs of the past few hundred years, and wore lighter more body defining clothes. Young women, and in particular those of the cutting edge set, would wear clinging materials,with no or little underclothing and in warm summer weather wet the dress down to be, essentially, see-through. Visualize this, versus the heavy clothes of, say, Marie Antoinette (no, not an English woman, but an arbiter of fashion, from just one generation before). The young women often had their hair cut shorter and curled. Young men for the first time went to shorter hair than had been seen previously as well. These are just examples, and a person may say they're trivial, but outward appearance often does define great changes in how a "new, young" generation sees and relates to, the world.
The influence of Beau Brummell, a fascinating person, very influential on society and fashion, could take up whole books. His main decree on the subject of male fashion was, first, CLEANLINESS: of the person, the clothing, then simplicity but always clean and neat. This was a radical new thought! Up until then bathing routinely, fresh air--had both been considered almost definitely ways to become seriously ill. Not since the ancient Romans, to my knowledge, had Western Europeans been encouraged to bathe! He influenced the entire society, and, another clothing change he encouraged, the wearing of the "cravat" which became de rigeur, eventually morphed into the male "tie" of today. Brummell, son of a valet, who rose to become THE insider of the inside set, which included the young Prince Regent, also led the way from the brightly colored clothes men had worn for centuries to simple black and whites that became rigidly routine for men, right up until the end of the 20th Century.
In short, the book gives you an overview of the period. It is NOT about crime, disease, (not really about the lower classes at all) economics or politics. It covers a certain "something" that made that generation special.
Jane Austin, a clergyman's daughter, living in the country, and poor, was part of the era but not really of it.
Look at some of the line drawings (from the era itself) in the book. The young men and women having dancing "practice parties" in homes in the daytime, to learn that sexy dance, the waltz....see how short many of the young women's dresses are. It was a state of mind, of freedom and youth.
Another generation, which began as it were in about 1820, when Queen Victoria came to the Throne, was the antithesis of the Regency era, with the rigid morality, rules for almost every aspect of life, hypocrasy, and puritanism we associate with "Victorianism". This overcame all that the Regency period had been. Women's dresses were, again, long and heavy and hid their lower limbs. Their hair was worn long, and usually up on the head after marriage. Men wore facial hair, heavy dark clothing, and the sense of freedom that had briefly influenced all of Europe and England since the American and then the French Revolution was ended.
I recommend this book to anyone interested in small parts of history that crop up every so often; usually battered down later, but influential for all that, as well as for anyone who has ever picked up a "Regency Romance" of any kind; or is simply interested in a unique time period made quite real for the reader in this book.