Good evening, some single track museum railways in the United Kingdom are still operated with staff or token blocks although all their stations are equipped not only with home signals but also with departure signals (generally "railway semaphore signals" with arms positioned at 45º in the dial lower or in the upper quadrant to communicate to the driver that the way is clear). It is therefore not clear to me the need to have a staff or token block in the presence of starting signals. In other words, the signals that authorize the sending of trains in the opposite direction along the single track section could not be interconnected with each other in order to avoid head-on collisions as well as pile-ups as happens on double-track lines equipped with "Absolute block" ? If I remember correctly, the intermediate railway stations of the lines operated with the "Radio Electronic Token Block" do not have departure signals, except the "Stop Board". Grateful for the attention given to me, I would like to take this opportunity to extend cordial and sincere regards
