The German ambassador to Great Britain, Herbert von Dirksen, had advised Berlin that the German case would seem stronger to the British people if Henlein and his movement were not seen as working for Berlin, and that Henlein should visit London to promote this idea. Henlein first went to Berlin, where he was given a memo written by Weizsäcker telling him what to say in London. Weizsäcker wrote: "Henlein will deny in London that he is acting on instructions from Berlin...Finally, Henlein will speak of the progressive disintegration of the Czech political structure, in order to discourage those circles which consider that their intervention on behalf of this structure may still be of use". Starting on 12 May 1938, Henlein visited London to press his case for autonomy, and impressed almost everyone he met as an apparently reasonable, mild-mannered man full of genial charm, who was simply asking for autonomy for his people. Henlein told the various British politicians he met that he was not working for Hitler, talked much about the Czechs were "oppressing" the ethnic Germans of the Sudetenland by forcing ethnic German children in some districts to attend schools where they were taught in Czech, and insisted he only wanted autonomy for the Sudetenland. During his London trip, Henlein consistently promoted the line that he only wanted a "fair deal" for the Sudeten Germans and claimed that he was against the Sudetenland joining Germany, noting how after the "Anschluss" the Austrian Nazis were pushed aside by the German Nazis, and said he did not want the same thing to happen to him. However Henlein did admit that if Prague refused to give in to all of the 8 demands of the Karlsbad programme, then Germany would definitely invade Czechoslovakia. No British politician in the cabinet met Henlein during his time in London as it was felt to be inappropriate for ministers of the Crown to meet an opposition politician from another country, but Henlein did meet with many backbenchers and journalists who came away sympathetic to Henlein's movement after meeting him.