Prime Minister David Cameron will kick off his efforts to reform the European Union on Tuesday with a declaration that his demands are not "Mission Impossible", just the price EU leaders must pay if he is to keep Britain in the bloc.
Cameron, who has frustrated some EU officials by giving away few details on the changes he would like to see, will on Tuesday send a letter to the President of the European Council Donald Tusk, setting out his four main objectives.
Those are: guarantees of fairness for non euro zone members, greater competitiveness, exemption from the principle of "ever-closer union" and tackling freedom of movement abuses.
"There will be those who say, here and elsewhere in the EU, that we are embarked on Mission Impossible," Cameron will say in a speech in London, according to advance extracts released by his office.
"I do not believe so for a minute."