This is a single sheet copy of the Charter bound into Matthew Paris’s Liber Additamentorum. Holt considered it to be not a copy but an authentic chancery exemplification of the 1225 Charter as circulated in 1253.1 This seems unlikely.2 The copy omits the witnesses apart from Archbishop Langton.
J. C. Holt, ‘The St Albans Chroniclers and Magna Carta’, Transactions of the Royal Historical Society, fifth series, 14 (1964), pp.67-88, reprinted in his collected essays, Magna Carta and Medieval Government (London, 1095), pp.266-87, at pp.81-2, 87-8.
See D.A. Carpenter, ‘Magna Carta 1253: the ambitions of the church and the divisions within the realm’, Historical Research, 86 (2013), p.183 note 25.