Changes

4545 4550 was built at York in 1957 to diagram number 93 (AC204), lot number 30243. It went into service on the Eastern Region in March 1957, where it remained apart from a brief allocation to the Northeast region between September 1967 and January 1968.<ref name=Longworth>[[Bibliography#Other References|Longworth (2013)]] p.57.</ref> It was eventually withdrawn from service at Heaton, Newcastle.<ref>SVR Stock Book 9th edition</ref>