Pliny the Elder called Great Britain by its most ancient name, Albion. So did Lord Byron, Rudyard Kipling, Salman Rushdie, and Led Zeppelin, among others.
People who regarded Britain as dishonest and hypocritical added "perfidious", as in perfidious Albion.
Adam Cohen at the NYT today doesn’t use perfidy in proposing impeachment of the current U.S. Attorney General, Alberto Gonzales. But he does charge Mr. Gonzales with turning the Justice Department into "an arm of a political party, choosing lawyers for nonpartisan positions based on politics, and bringing cases — including prosecutions that have put people in jail — to help Republicans win elections." Mr. Cohen also mentions "Mr. Gonzales’s repeated false and misleading statements to Congress" and likens his conduct to "the sort of abuse the founders worried about" when they allowed for impeachment.