Perfidious Albion is a pejorative phrase used within the context of international relations and diplomacy to refer to acts of duplicity, treachery and hence infidelity (with respect to promises made to or alliances formed with other nation states) by monarchs or governments of Britain (or England) in their pursuit of self-interest and the requirements of realpolitik.
Perfidious signifies one who does not keep his faith or word (from the Latin word “perfidia”), while Albion is an ancient Roman name for Great Britain.
For copious examples of this behaviour I recommend “Secret Affairs: Britain’s Collusion with Radical Islam” by Mark Curtis.
In Secret Affairs, Mark Curtis shows how Britain has helped create the Islamic terrorism that now threatens us. Exploring how the bombings of 7/7 can be traced back to groups and individuals trained and supported by Britain, Curtis draws on formerly classified government files to unravel a long history of the British government’s secret collusion with and direct involvement in Islamic terrorism, from 1945 to the present day. From the overthrow of Iran’s popular government during the 1950s and the rise of the Muslim Brotherhood in Syria, to Libya, Kosovo, Afghanistan and Saudi Arabia’s ruthless internal oppression, Secret Affairs shows Britain’s hidden hand in the rise of global terrorism. At a time when British forces are being sent to wage war in Afghanistan in increasing numbers, Mark Curtis’ book shows how the seeds of today’s lose-lose situation were sown a long time ago in a hidden politics as ineffective as it was immoral.