14 January – the fourth Parliament of King Henry IV opens for a session of two months. Henry grants it the power to appoint Royal Councillors and hold them to account for expenditure.[1]
20 March – as the English Parliament adjourns, Henry IV gives royal assent to acts that have passed, including the Gold and Silver ("Multipliers") Act, intended to prohibit alchemists from performing transmutation of common substances into precious metals.[6]
16 October – the 5th Parliament of Henry IV (summoned 25 August), nicknamed "The Unlearned Parliament" because Henry refuses to allow lawyers to sit, opens for a 4-week session in Coventry, closing on 13 November. Henry withdraws its powers of oversight over the Royal Council.[1]
8 June – following the collapse of their revolt, Richard Scrope together with Thomas de Mowbray, 4th Earl of Norfolk, and Scrope's nephew, Sir William Plumpton, are tried by a special commission and beheaded at York.[1] Scrope is the first English prelate to suffer judicial execution.
August – Welsh rebels, assisted by the French, unsuccessfully attack Worcester.[2]
1 March – Parliament meets, and continues to sit until December, when it finally achieves its aims of nominating and ensuring the payment of members of the Royal Council.[1]
30 March – the heir to the Scottish throne, Prince James, having been captured by English pirates on 22 March, is detained in England.[9] On 4 April he becomes King James I of Scotland on the death of his father but remains detained in England for 18 years.