Sir Ivor (1965–1995) was an American-bred Irish-trained Thoroughbred racehorse and sire. who competed from a base in Ireland. In a career which lasted from July 1967 to October 1968 he ran thirteen times and won eight races. He won major races in four countries: the National Stakes in Ireland, the Grand Criterium in France, the 2000 Guineas and the Epsom Derby in England and the Washington, D.C. International in the United States. he was retired to stud at the end of the 1968 season and became a successful stallion.

Sir Ivor was bred by Alice Headley Bell at the Mill Ridge Farm in Kentucky. He was from the second crop of foals sired by Secretariat's half-brother Sir Gaylord, out of the mare Attica, who produced several other winners. As a yearling the colt was sent to the sales and was bought for $42,000 by American businessman and U.S. Ambassador to Ireland, Raymond R. Guest, who named the horse after his British grandfather, Sir Ivor Guest, 1st Baron Wimborne. Sir Ivor was sent to Ireland to be trained by Vincent O'Brien at Ballydoyle.

Sir is an honorific address used as a courtesy title to address a man without using his given or family name in many English speaking cultures. It is often used in formal correspondence (Dear Sir, Right Reverend Sir).

The term is often reserved for use only towards one of superior rank or status, such as an educator or commanding officer, an elder (especially by a minor), or as a form of address from a merchant to a customer.

Equivalent terms of address are "ma'am" or "madam" in most cases, or in the case of a very young woman, girl, or unmarried woman who prefers to be addressed as such, "miss". The equivalent term for a knighted woman is Dame, or "Lady" for the wife of a knight.

Sir derives from the Middle French honorific title sire (messire gave rise to mylord), from the Old French sieur (itself a contraction of Seigneur meaning 'lord'), from the Latin adjective senior (elder), which yielded titles of respect in many European languages. The form sir is first documented in English in 1297, as title of honor of a knight or baronet, being a variant of sire, which was already used in English since at least c.1205 as a title placed before a name and denoting knighthood, and to address the (male) Sovereign since c.1225, with additional general senses of "father, male parent" is from c.1250 and "important elderly man" from 1362.

Sir Geoffrey Nice (born 21 October 1945, London) is a British barrister and activist.

He attended St Dunstan's College, Catford, and Keble College, Oxford. He was appointed Queen's Counsel in 1990. Nice was a deputy prosecutor at Slobodan Milosevic's trial in The Hague. He initiated the prosecution's initial case of linking atrocities committed in the former Yugoslavia to Milosevic. He also prosecuted several cases for the International Criminal Tribunal for the Former Yugoslavia (ICTY) since 1998, including the cases of the Bosnian Croat Dario Kordić, who was subsequently jailed for 25 years, and the successful prosecution of Goran Jelisić, the self-styled "Serbian Adolf".

In the United Kingdom, Nice's practice also includes human rights/public law and personal injury. He was created a Knight Bachelor in 2007.

Sir Ivor Martin Crewe (born 15 December 1945) is the Master of University College, Oxford. He was previously Vice-Chancellor of the University of Essex and Professor in the Department of Government.

Crewe was educated at Manchester Grammar School and then went to Exeter College, Oxford, where he gained a first-class BA in Philosophy, Politics, and Economics in 1966. From 1977 to 1982, he was editor of the British Journal of Political Science and from 1984 to 1992 he was a co-editor.

From 1995 to 1 September 2007, he was the Vice-Chancellor of the University of Essex and is a former Chair of the 1994 Group and President of Universities UK. The Ivor Crewe Lecture Hall at the university, completed in 2006, is named after him.

In July 2008, Sir Ivor succeeded Lord Butler of Brockwell as Master of University College, Oxford.

He is generally credited with being the person to first write about pocket book voting, particularly in the 1987 general election.

He was appointed Knight Bachelor by HM The Queen in the New Year Honours List 2006.

Lester Keith Piggott (born 5 November 1935) is a retired English professional jockey, popularly known as "The Long Fellow". With 4,493 career wins, including nine Epsom Derby victories, he is one of the most well-known English flat racing jockeys of all time.

Lester Piggott was born in Wantage to a family that could trace its roots as jockeys and trainers back to the 18th century. The Piggotts were a Cheshire farming family who in the 1870s ran the Crown Inn in Nantwich for at least 40 years. Lester's grandfather Ernest (Ernie) Piggott (1878–1941) owned a racehorse stable at The Old Manor in Letcombe Regis and his father (Ernest) Keith Piggott (1904–1993) another at South Bank in Lambourn, where Lester lived until 1954. Ernie Piggott rode three Grand National winners, in 1912, 1918 and 1919 and was married to a sister of the jockeys Mornington Cannon and Kempton Cannon, who both rode winners of the Derby, in 1899 and 1904 respectively. He was also three-times British jump racing Champion Jockey (in 1910, 1913 and 1915). Keith Piggott was a successful National Hunt jockey and trainer, winning the Champion Hurdle as a jockey in 1939 and the Grand National as a trainer in 1963 with Ayala, becoming the British jump racing Champion Trainer of the 1962–63 season. Lester Piggott is the cousin, through his mother Lilian Iris Rickaby, of two other jockeys, Bill and Fred Rickaby. Fred Rickaby was British flat racing Champion Apprentice in 1931 and 1932.