One of the 35 built of the A4 steam engine class
4464 Bittern is a London and North Eastern Railway (LNER) Class A4 steam locomotive. Built for the LNER and completed on 18 December 1937 at Doncaster Works as works number 1866, it received number 4464. After that it was renumbered 19 on 16 August 1946 under the LNER 1946 renumbering scheme, and finally 60019 by British Railways on 10 October 1948, after nationalisation. Of the 35 strong class, it is one of six to survive into preservation but it is one of only two currently scheduled to be certified for mainline use.
In preservation, the locomotive has also worn the identities of a number of its scrapped classmates, including the first of the A4 class 2509 Silver Link and most recently as 4492 Dominion of New Zealand.