Don't give me that shit kid. If it was printed in an Awdry book then ignore it. ALL locomotives, aircraft etc are perceived as 'female', mainly due to the general behavior of the said machines. It's how it's been for two centuries so Awdry and his associates that carried on with TTTE can sod off.
Thanks There were small variations in how the livery was applied. At Doncaster, the cylinders were lined, whilst at Darlington a square apple green patch with white lining was applied to the cylinders. As far as I know, Morayshire is currently the only loco in Darlington green: [link]