This is a timeline of British history, comprising important legal and territorial changes and political events in the United Kingdom and its predecessor states.
To read about the background to these events, see History of England, History of Wales, History of Scotland, History of Ireland, Formation of the United Kingdom of Great Britain and Northern Ireland and History of the United Kingdom.3rd Century Britain: Wikipage Caracalla, now Emperor, abandons territory north of Hadrian's Wall, and returns to Rome General Victorinus puts down revolt, and settles Burgundian and Vandal prisoners in Britain.
Constantius returns to Gaul.
First mention on record of the Picts attacking from the north in Eumenius' Panegyrici Latini.