Editing LSWR N15 class (section)

===LSWR and Southern Railway===
Under LSWR ownership, the "Urie N15s" were painted in Urie's LSWR sage green [[livery]] for passenger locomotives.<ref name=Bradley5>Bradley (1987), p. 5</ref> This was distinct from Drummond's sage green because it was more olive in colour, and yellowed with cleaning and weathering.<ref name=Bradley5 /> Black and white [[London and South Western Railway#Locomotive liveries|lining]] decorated the boiler bands and borders of the sage green panels.<ref name=Bradley5 /> The lettering was in [[Gilded|gilt]]: the initials "LSWR" located on the side of the tender, the locomotive number on the cabside.<ref name=Swift-50>Swift (2006), p. 50</ref>

The first Southern livery continued that of the LSWR, though with primrose yellow [[decal|transfers]] showing "SOUTHERN" and the locomotive number, placed on the tender.<ref name=Bradley5 /> The lining separating the black border on tender and cab side panels was changed to yellow.<ref name=Bradley5 /> Primrose yellow [[decal|transfers]], showing "SOUTHERN" and the locomotive number, were placed on the tender.<ref name=Swift-50 /> An "E" prefix was located above the tender number (e.g. E749), denoting that the class was registered for maintenance at Eastleigh works.<ref name=Bradley5 /> The gilt numerals on the cabside and tender rear were replaced by a cast oval plate with "Southern Railway" around the edge and the number located in the centre. Yellow numerals were painted onto the front [[buffer beam]] to ease identification.<ref name=Swift-50 /> In February 1925 Maunsell developed a deeper green with black and white lining.<ref name=Swift-50 /> This was applied to his new King Arthur class locomotives and the "Urie N15s" were similarly painted when overhauls were due.<ref name=Swift-50 /> Wheels were olive-green with black tyres.<ref name=Swift-50 /> From 1929 the "E" prefix was removed and the cast numerals on the tender rear were removed and replaced with yellow transfers (e.g. 749).<ref name=Bradley5 />

In May 1938, after Bulleid's appointment as CME, No.&nbsp;749 ''Iseult'' was trialled in bright unlined light green with yellow-painted block numerals replacing the cast numberplates.<ref name=Bradley5 /> The tender was given two designs of lettering, with "SOUTHERN" on one side and the initials "SR" on the other.<ref name=Bradley5 /> The Board of Directors disapproved and Bulleid repainted the locomotive in darker [[malachite green]] with black and white lining (this would later be applied to his Pacifics).<ref name=Bradley5 /> The legend "SOUTHERN" in block-lettering remained on the tender, though the number was relocated to the cabside on one side and the smoke deflector on the other.<ref name=Swift-56 /> Both were painted in a light "sunshine yellow". No.&nbsp;749 was returned to Maunsell's green livery.<ref name=Swift-56 />

Several variations of the Maunsell green, Urie sage green and Bulleid [[malachite green]] liveries were tried with black, white/black, and yellow lining, some sporting a green panel on the smoke deflectors.<ref name=Swift-56>Swift (2006), p. 56</ref> However, from 1942 to 1946, during the Second World War and its aftermath, members of the class under overhaul were turned out in unlined-black livery as a wartime economy measure, with green-shaded sunshine yellow lettering.<ref name=Swift-64 /> The final Southern livery used from 1946 reverted to malachite green, with yellow/black lining, and sunshine yellow lettering. Some of the class (Nos.&nbsp;782 and 800, ''Sir Brian'' and ''Sir Persant'') did not receive this livery.<ref name=Swift-64>Swift (2006), p. 64</ref>