Question: Which British aristocrat and politician born in 1945 served as the Chairman of the Council of King's College London before Christopher Geidt?
Sentence (from "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.
Relevant evidence: No