How successful was Anglo-German diplomacy in the 1920s? (Modern World History, OCR exam board, A-level question)

At the end of the 1920s there seemed to have been a positive step forward in peaceful relations between Germany and Britain after the antagonistic peace brought about by the Versailles peace treaty. The Locarno "honeymoon" had created a feeling of goodwill among the general population at least in Britain. Yet behind the closed doors of the negotiating table leaders/diplomats must have been aware of the limitations of the existing peace and friendly 'spirit'.
There was disagreement between France, America and Britain in diplomatic attitude to Germany: France believing Versailles was the end…