Editing LMS Coronation Class (section)

==== Removal of streamlining ====
George Ivatt's 1945 report also recommended the removal of all streamlining casings and they were removed from the fitted locomotives from 1946 onwards.{{r|Roden|p=64}} It had been found to be of little value at speeds below {{convert|90|mi/h|km/h|abbr=on}}, and was unpopular with running shed employees as it caused difficulty of access for maintenance. The first step towards de-streamlining was carried out during the Second World War when many of the streamlined tenders had their side sheets cut away at the rear of the tender. Many photographs exist showing this measure.{{r|Jenkinson|loc=Plates 34,96,114,125 and 144}}<ref name="Talbot11">{{cite book |last=Talbot |first=Edward |year=2011 |title=LMS POWER, The 'Coronation' Class |location=Stafford |publisher=Edward Talbot |isbn=978-0-9542787-5-5}}</ref>{{rp|pp=100–104 and 106 |at=Plates 147–150, 154–157 and 159}} The removal of the streamlining proper commenced in April 1946 with No. 6235 ''City of Birmingham''. All de-streamlining coincided with the fitting of smoke deflectors. No. 6243 ''City of Lancaster'' was renumbered as 46243 in April 1948{{r|Banks|p=148}} and, as it was not de-streamlined until May 1949, it became the only locomotive to carry its British Railways number while streamlined.

Initially, locomotives that had previously been streamlined could be readily recognised by the sloping top to the front of their smokeboxes, as well as slightly smaller front-facing cab windows.{{r|Baker|pp=56, 62}} {{r|Jenkinson|loc=Plate 86}} In due course all were re-equipped with cylindrical smokeboxes and larger cab windows, often, but not necessarily, at the same time.{{r|Jenkinson|loc=Plates 17, 41 and 127}}The first locomotive to receive a cylindrical smokebox was No. 6226 ''Duchess of Norfolk'' in October 1952. The last one to retain the sloping top was 46246 ''City of Manchester'' which appeared with its new smokebox in May 1960.{{r|Baker|p=59}}

Even following the conversion to cylindrical smokeboxes, it was still possible to distinguish some non-streamliners from ex-streamliners. On the former (Nos. 46230-46234 and 46249-46252, but not 46253-46257) the running plates veered downwards at right angles to connect with the buffer beam in the style of the Princess Royal Class.{{r|Jenkinson|loc=Plate 56}} The ex-streamliners did not have any such connection,{{r|Jenkinson|loc=Plate 3}} except No.46242 ''City of Glasgow'' which was rebuilt in 1952 following a serious collision.{{r|Jenkinson|loc=Plates 120 and 123}}