Question: Which British aristocrat and politician born in 1945 served as the Chairman of the Council of King's College London before Christopher Geidt?

full_context: Document 1: Principal Private Secretary to the Prime Minister: The Principal Private Secretary to the Prime Minister is a senior official in the British Civil Service who acts as Principal Private Secretary to the Prime Minister of the United Kingdom. The holder of this office is traditionally the head of the Prime Minister's Office. In the Civil Service, the role is currently graded as a Director-General. To date, no woman has ever occupied the office. In fiction, the character of Bernard Woolley in the television series "Yes, Prime Minister", occupied this post.
Document 2: Sir William Mount, 1st Baronet: Sir William Arthur Mount, 1st Baronet CBE (Hartley, Hampshire, 3 August 1866 – 8 December 1930) was a British Conservative Party politician and Member of Parliament for the Newbury constituency. He is the great-grandfather of Conservative politician David Cameron, who was Prime Minister of the United Kingdom from 2010 to 2016.
Document 3: George Osborne: George Gideon Oliver Osborne, (born Gideon Oliver Osborne; 23 May 1971) is a British Conservative Party politician, who was Member of Parliament (MP) for Tatton from June 2001 until he stood down on 3 May 2017. He served as Chancellor of the Exchequer under Prime Minister David Cameron from 2010 to 2016. He has been editor of the "London Evening Standard" since May 2017.
Document 4: 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.
Document 5: Hugh Grosvenor, 7th Duke of Westminster: Hugh Richard Louis Grosvenor, 7th Duke of Westminster (born 29 January 1991), styled as Earl Grosvenor until August 2016, is a British aristocrat, billionaire, businessman and landowner. He is the third child and only son of Gerald Grosvenor, 6th Duke of Westminster and his wife Natalia Phillips Grosvenor, Duchess of Westminster. He inherited the title of Duke of Westminster on 9 August 2016, on the death of his father. The duke is estimated to be worth US$13 billion, making him the world's richest person aged under 30.
Document 6: Charles, Prince of Wales: Charles, Prince of Wales (Charles Philip Arthur George; born 14 November 1948) is the eldest child and heir apparent of Queen Elizabeth II. Known alternatively in Cornwall as Duke of Cornwall and in Scotland as Duke of Rothesay, he is the longest-serving heir apparent in British history, having held the position since 1952. He is also the oldest person to be next in line to the throne since Sophia of Hanover (the heir presumptive to Queen Anne), who died in 1714 at the age of 83.
Document 7: Alexander Thynn, 7th Marquess of Bath: Alexander George Thynn, 7th Marquess of Bath (born 6 May 1932), styled Viscount Weymouth between 1946 and 1992, is an English politician, artist and author. He was ranked 359th in the "Sunday Times Rich List 2009" with an estimated wealth of £157 million.
Document 8: Private Secretary to the Sovereign: The Private Secretary to the Sovereign is the senior operational member of the Royal Household of the Sovereign of the United Kingdom (as distinct from the Great Officers of the Household). The Private Secretary is the principal channel of communication between the monarch and the governments in each of the Commonwealth realms. They also have responsibility for the official programme and correspondence of the Sovereign. Through these roles the position wields considerable influence.
Document 9: Gerald Grosvenor, 6th Duke of Westminster: Major General Gerald Cavendish Grosvenor, 6th Duke of Westminster, (22 December 1951 – 9 August 2016) was a British landowner, businessman, philanthropist, Territorial Army general and hereditary peer. He was the son of Robert George Grosvenor, 5th Duke of Westminster and Viola Grosvenor. He was Chairman of the property company Grosvenor Group. He is succeeded by his son, Hugh Grosvenor, 7th Duke of Westminster.
Document 10: Chris Skidmore: Christopher James Skidmore, {'1': ", '2': ", '3': ", '4': "} (born 17 May 1981) is a British politician, author, and historian. He has served since 2010 as the Conservative Member of Parliament (MP) for Kingswood, South Gloucestershire, and in 2015 became Parliamentary Private Secretary to the Chancellor of the Exchequer. When Theresa May became Prime Minister in 2016 he was appointed Parliamentary Secretary at the Cabinet Office, where he is described as Minister for the Constitution.
Document 11: Edward Fitzalan-Howard, 18th Duke of Norfolk: Edward William Fitzalan-Howard, 18th Duke of Norfolk, (born 2 December 1956), styled Earl of Arundel between 1975 and 2002, is a British peer, Earl Marshal and son of Miles Fitzalan-Howard, 17th Duke of Norfolk.
Document 12: Christopher Whatley: Christopher Allan Whatley, OBE, FRHistS, FRSE is a well-known and widely published Scottish historian. He has been Professor of Scottish History at the University of Dundee since 1997. He is a prominent opponent of Scottish independence and chaired the inaugural meeting of the local Better Together campaign in Dundee during the 2014 Scottish independence referendum.
Document 13: Charles Wellesley, 9th Duke of Wellington: Arthur Charles Valerian Wellesley, 9th Duke of Wellington, (born 19 August 1945) is a British aristocrat and politician. He has served as Conservative Party Member of the European Parliament (1984–1989) for Surrey West and currently sits as a hereditary peer in the House of Lords since 2015.
Document 14: Arthur Wellesley, 1st Duke of Wellington: Field Marshal Arthur Wellesley, 1st Duke of Wellington, {'1': ", '2': ", '3': ", '4': "} (1 May 1769 – 14 September 1852) was an Anglo-Irish soldier and statesman who was one of the leading military and political figures of 19th-century Britain. His defeat of Napoleon at the Battle of Waterloo in 1815 put him in the first rank of Britain's military heroes.
Document 15: Jamie Lowther-Pinkerton: Anthony James Moxon Lowther-Pinkerton, LVO, MBE, DL (born 28 September 1960) is Private Secretary to the Duke and Duchess of Cambridge and to Prince Harry, in the Household of the Duke and Duchess of Cambridge and Prince Harry. He was appointed on 2 May 2005 but resigned as full-time Private Secretary with effect from September 2013, remaining for a single day a week in order to mentor and advise the younger staff who shall have to succeed him. The Household shares facilities with the larger Household of the Prince of Wales. Jamie is godfather to Prince George of Cambridge.
ground_truth: Duke of Wellington