List of trials of peers in the House of Lords

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This is a list of trials of peers in the House of Lords. Until 1948, peers of the United Kingdom and its predecessor states had the right to trial by their equals.

YearPeerChargeVerdictSentence
1499 Edward Plantagenet, 17th Earl of Warwick TreasonPleaded guiltyDeath
1521 Edward Stafford, 3rd Duke of Buckingham TreasonGuiltyDeath
1534 William Dacre, 3rd Baron Dacre TreasonNot guilty
1536Queen Anne Boleyn TreasonGuiltyDeath
George Boleyn, Viscount Rochford
1541 Thomas Fiennes, 9th Baron Dacre MurderGuiltyDeath
1551 Edward Seymour, 1st Duke of Somerset TreasonGuilty of felony Death
1553 John Dudley, 1st Duke of Northumberland TreasonGuiltyDeath
1571 Thomas Howard, 4th Duke of Norfolk TreasonGuiltyDeath
1589 Philip Howard, 20th Earl of Arundel and SurreyTreasonGuiltyDeath (died before sentence was carried out)
1600 Robert Devereux, 2nd Earl of Essex TreasonGuiltyDeath
Henry Wriothesley, 3rd Earl of Southampton Death (pardoned)
1603 Thomas Grey, 15th Baron Grey de Wilton TreasonGuiltyDeath (commuted to imprisonment)
Henry Brooke, 11th Baron Cobham
1616 Robert Carr, 1st Earl of Somerset MurderGuiltyDeath (pardoned)
1616 Frances Carr, Countess of Somerset MurderPleaded guiltyDeath (pardoned)
1631 Mervyn Tuchet, 2nd Earl of Castlehaven Rape and sodomyGuiltyDeath
1641 Thomas Wentworth, 1st Earl of Strafford TreasonProsecution dropped
1666 Thomas Park, 15th Baron Morley MurderGuilty of manslaughterPleaded privilege*
1678 Charles Cornwallis, 3rd Baron Cornwallis MurderNot guilty
1678 Philip Herbert, 7th Earl of Pembroke MurderGuilty of manslaughterPleaded privilege*
1680 William Howard, 1st Viscount Stafford TreasonGuiltyDeath
1686 Henry Booth, 1st Baron Delamer TreasonNot guilty
1692 Charles Mohun, 4th Baron Mohun MurderNot guilty
1699 Edward Rich, 6th Earl of Warwick and HollandMurderGuilty of manslaughterPleaded privilege*
1699 Charles Mohun, 4th Baron Mohun MurderNot guilty
1716 James Radclyffe, 3rd Earl of Derwentwater TreasonPleaded guiltyDeath
William Widdrington, 4th Baron Widdrington Death (pardoned)
William Maxwell, 5th Earl of Nithsdale Death (escaped)
Robert Dalzell, 5th Earl of Carnwath Death (pardoned)
William Gordon, 6th Viscount Kenmure Death
William Murray, 2nd Lord Nairne Death (pardoned)
1716 George Seton, 5th Earl of Winton TreasonGuiltyDeath (escaped)
1717 Robert Harley, 1st Earl of Oxford and Mortimer TreasonNot guilty
1746 William Boyd, 4th Earl of Kilmarnock TreasonPleaded guiltyDeath
George Mackenzie, 3rd Earl of Cromartie Pleaded guiltyDeath (pardoned)
Arthur Elphinstone, 6th Lord Balmerinoch GuiltyDeath
1747 Simon Fraser, 11th Lord Lovat TreasonGuiltyDeath
1760 Laurence Shirley, 4th Earl Ferrers MurderGuiltyDeath
1765 William Byron, 5th Baron Byron MurderGuilty of manslaughterPleaded privilege*
1776 Elizabeth Pierrepont, Duchess of Kingston-upon-Hull BigamyGuiltyPleaded privilege*
1841 James Brudenell, 7th Earl of Cardigan DuellingNot guilty
1901 Frank Russell, 2nd Earl Russell BigamyGuilty3 months' detention
1935 Edward Russell, 26th Baron de Clifford ManslaughterNot guilty
*These were all capital crimes; the usual sentence was death. From 1547 if a peer or peeress was convicted of a crime, except treason or murder, he or she could claim "privilege of peerage" to escape punishment if it was their first offence. In all, the privilege was exercised five times, until it was formally abolished in 1841.
Lovell, C. R. (October 1949) "The Trial of Peers in Great Britain" The American Historical Review55: 69–81

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