In 1963, Konrad Adenauer was succeeded as West German Chancellor by Ludwig Erhardt. Erhardt had been Adenauer's successful Economy Minister since 1949, and was seen as the father of the German economic miracle of the post-war era. He was also far more anglophile and anti-EEC, francophobe than Adenauer had been, which meant that the relations between the two countries worsened while Erhardt became an important ally to Britain within the EEC as it tried to enter it.
Now, say that for whatever reason Adenauer or the CDU/CSU decide that someone else should succeed Adenauer, who could it be and how could that happen?
Now, say that for whatever reason Adenauer or the CDU/CSU decide that someone else should succeed Adenauer, who could it be and how could that happen?