NOTE - when I was explaining the head codes, I think I may have got mixed up with my lefts and rights! I have mild dyspraxia and I struggle when explaining left and right. and only noticed on the premiere so apologise for any confusion.
the pictures are right and what they represent though.
back in the days where the computer chip was a fantasy and that pen paper and the signal box were king, how could you at a glance tell train classes apart? the answer was the humble head code! today we explore the codes, what they mean how how they have changed throughout the decades.
