Hello Deminoo
the headboard refers to the name board on the front of the train.
A number of English trains in particular have names such as "The Merseyside Express" or "The Royal Highlander'.
I have a few Ace Locomotives and I am pleased with them, i have not purchased any Darstaed or Seven Mills, simply because they have not produced any model that I do not have an older model of such as a GNR Atlantic.
Had Darstaed proceeded with their proposed line of Single driver locomotives, it is likely i would have bought several.
I hope this helps
Roland