Serlo le Mercer was Mayor of London for five terms in the early 1210s."Chronicles of the Mayors and Sheriffs: 1188–1239" in Chronicles of the Mayors and Sheriffs of London 1188–1274, ed. H.T. Riley. London: Trübner, 1863. pp. 1–8. British History Online. Retrieved 24 April 2016. He was a member of the Worshipful Company of Mercers and was one of the negotiators of Magna Carta.William Hardel. Magna Carta Trust. Retrieved 24 April 2016.

See also List of lord mayors of London

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