Which British aristocrat and politician born in 1945 served as the Chairman of the Council of King's College London before Christopher Geidt?
Christopher Geidt Sir Christopher Edward Wollaston MacKenzie Geidt {'1': ", '2': ", '3': ", '4': "} (born 17 August 1961) was the private secretary to Queen Elizabeth II from September 2007 to 2017. As of July 2016, Geidt also serves as the Chairman of the Council of King's College London, succeeding the Duke of Wellington.
Oliver Heald Sir Oliver Heald, {'1': ", '2': ", '3': ", '4': "} (born 15 December 1954) is a British barrister and Conservative politician, who currently serves as Member of Parliament (MP) for North East Hertfordshire.