TTTE Headcode Reference Post
The North Western Railway has its own headcode system, which in practice is extremely similar to that which was standardized by British Railways.
The above scan is via @SleeperAgent01.
You can practice 'reading' the codes using images from the RWS below the cut! (The codes were more often accurate in the RWS than TVS…although they weren’t always consistent in those illustrations, either!)













