What should we do, re: Russia

SO. We've PNG'd some Russian diplomats (spies). What should we do next, Sir Humphrey?

Sir Humphrey: Well, Minister, in practical terms we have the usual six options: One, do nothing. Two, issue a statement deploring the speech. Three, lodge an official protest. Four, cut off aid. Five, break off diplomatic relations. And six, declare war.

Jim Hacker: Which should be it?

Sir Humphrey: Well, if we do nothing we implicitly agree with the speech. Two, if we issue a statement we'll just look foolish. Three, if we lodge a protest it'll be ignored. Four, we can't cut off aid because we don't give them any. Five, if we break off diplomatic relations we can't negotiate the oil rig contracts. And six, if we declare war it might just look as though we were over-reacting.