[A Ruckus of Dogs]

It's the upper class that has always been immodest in Britain

Yep, just look at the royal family.

[AnAmericanMother]

Actually, Queen Elizabeth, her dad, and his dad were pretty well behaved - got made fun of for being "bourgeois" royals. Edward VIII was more typical.

But before that, the royals were extremely naughty (some scandal even surrounded Queen Victoria, a/k/a "Mrs. Brown"). Her son Edward VII was a legendary roue, and of course George III's various sons (including Victoria's father, the egregious George IV (Prince Regent), and the Duke of Cumberland (who murdered his valet and was accused of committing incest with his sister), collectively called by the Duke of Wellington "the damndest set of millstones around the neck of a nation".

But I was thinking more of the likes of Caro Lamb or the Duchess of Devonshire, or maybe Earl Ferrers, who was hanged for murder and delivered to the dissectionists.