Saw the series on PBS in the seventies. Enjoyed the book as much as the show.
When lovely young Louisa was chosen over the head cook to prepare a feast for the Prince of Wales, the other servants were outraged. But His Majesty was adamant. Her vivacious charm had aroused in him a more than culinary interest...Beautiful, exciting, irresistible, she became the new royal mistress and darling of the elegant elite. The handsome, elusive Charlie Tyrrell was so smitten that he tried to propose! But Louisa went on to open the most fashionable hotel fo the day--a luxurious maison de plaisir, famous for its secret trysts and exquisite food. At last, she had earned her rightful place among the snobs. She, Louisa Leyton, a mere servant girl, was now Duchess of Duke Street, he name spoken with raised eyebrows and celebrated throughout England.