The governments of the USA and UK were cosigners, with the USSR, of the Potsdam Agreement, which is what mandated the transfer of ethnic German population from central and eastern Europe to Germany and Austria.
The Three Governments, having considered the question in all its aspects, recognize that the transfer to Germany of German populations, or elements thereof, remaining in Poland, Czechoslovakia and Hungary, will have to be undertaken. They agree that any transfers that take place should be effected in an orderly and humane manner.
Reading between the lines, was the question asked with the assumption that the expulsion of German people was done unilaterally by the USSR? Or were you interested more in the public response? Or differences of opinion that occurred between politicians before the Potsdam Agreement was signed?