A common myth repeated by many people for various reasons is that the Magna Carta of 1215 made by King John was either “never law” or “was repealed” or “was replaced by the Magna Carta of 9 Henry 3.” These are “fake news.” The current UK Cabinet Office Manual says that

Constitutional matters and practices may include: • statutes, such as Magna Carta in 1215 (UK Cabinet Manual)

Further, Edward Coke says, of Henry’s Magna Carta,

… and it was no new declaration: for king John in the 17 yeare of his raigne had granted the like, which also was called Magna Charta, as appeareth by a record before this great charter made by king H. 3

Home ne fuer’ mordanc’ apud Westmonasfterium des terres in auter countie, car ceo fer encont’ lestatut de Magna Charta sinon que illa assisa semel interminata suit coram justic” (Pasch. 5 H. 3. tit’ Mordaunc’ f. 53)” (2 Inst, Proeme, p. 4) (2 Inst, Proeme, p. 4)