It has to be said that the matter was somewhat settled in European circles by an agreement between Francois Mitterrand and Helmut Kohl: Germany would be reunited, but in exchange it would be "bridled" by the common European currency that was being designed. Most other countries were in support of this arrangement, since they stood to gain from effectively sharing the power of the almighty Deutschmark (which they did, and are, despite some other issues). Britain had no realistic chance to oppose anything.