The Toronto Star reported today that Lord Black of Attica, er Crossharbour, wants back the Canadian citizenship he renounced in order to become a British lord.
One advantage of Canadian citizenship is if you're convicted of corporate fraud in, say, the U.S., you can serve it here -- something you can't do if you're a Brit.
I guess one has to make plans in case the unthinkable happens and an innocent man is convicted.