Churchward is pronounced: 'GOD', blimey! No, not even Stephen Fry could convince of that definition even if it did appear on QI, but I'll go with Church (place of worship) -ward (where hospital patients are kept).
45XX, damn cute little engines, I have a weakness for the things, myself ... okay, okay, I've got one!, I've confessed, I feel better.
Thanking you, your GWR-ness