8–23 April – Isambard Kingdom Brunel's paddle steamer SS Great Western (completed on 31 March) makes the Transatlantic Crossing to New York from Avonmouth in fifteen days, inaugurating a regular steamship service.[4]
31 May – Battle of Bossenden Wood: In Kent, self-declared Messiah John N. Thom, calling himself "Sir William Courtenay", and a band of around 35 agricultural labourers are surrounded by soldiers of the 45th Regiment of Foot sent to arrest them following the earlier murder of a policeman. Thom and ten followers, together with an officer and a constable, are killed in what is sometimes described as the last battle on English soil.[6]