With two popes to choose from, the English were by 1378 was the last major power in Europe to decide who they would lend their support to. Both sent legates to the parliament meeting at Gloucester in the autumn of 1378 and although the history below is silent on the subject, it is certain that Adam Easton had used his influence in England to advance the cause of the man he considered to have been correctly elected pope.
(20 October 1378 at Parliament of Gloucester) Ad hoc parliamentum venerunt nuntii cum bulla utriusque papae rogantium Regem ut assisteret ecclesiae. Rex vero praecepit archiepiscopo Cantuarensi ut audiret eos et decerneret cum quo tenendum esset et quod acciperet clericorum consilium et tempus sufficiens. Archiepiscopus auditis partibus, venit parliamentum et dixit “sicut respondere volo coram deo, recipiatis Urbanum”. Et ibi statutum fuit quod omnes Anglici reciperent Urbanum. Urbanus papa expulit Regem Cisiliae et Neapolis de genere Anglicorum dicens eum schismaticum et Gallicis alligatum et talis non debet regnare in spirituali patrocinio Beati Petri. Et Karolum de Pace cognatum sum cum assistentia regni regem fecit (2 June 1381).
From Eulogium Historiarum