To answer your general question, you would use a running signal for shunting wherever it is appropriate (ie the same movement as the running movement for which the signal was necessary), and it is not normal practice to provide a shunt signal where the running signal will serve. It would only be provided
in addition to a running signal to give access to routes which are not normal running moves - eg a crossover to the wrong line, entry to a siding etc. A calling on arm would only be provided under a main arm, and only where movements are made regularly to an occupied track. Which arm the signalman clears tells the driver whether or not the platform is occupied. A shunt signal might be used instead of a call-on; both signals convey the message that the driver may only proceed as far as the line is clear.
What you could get is a "Shunt Ahead" signal (which may
look the same as a call-on) where you have to pass the starting signal but no advanced starter is provided. This would allow allow you to enter the section, but only as far as necessary for the shunt movement.
In general you only need to get a Line Clear for the most advanced signal (ie the Advanced starter if present, or if not then the Starter, or if both are absent then the Home).
General practice is to clear signals in the same order the train reaches them, so an advanced starter would not be cleared before the starter. This may be enforced by "sequential locking".
A calling on arm would not normally be appropriate for a run-around; these are only used to enter occupied platforms, and you obviously can't use an occupied track to reach the other end of your train. If there is an advanced starter, you would keep that at danger, and clear the starter to allow the loco to draw forward clear of points. There would normally be a shunt signal to authorise the return via a crossover to another platform (although on a single line, there would be a Home signal there so no shunt signal would be necessary).
You need to rejoin your train having passed it on another track. That is where a calling-on arm could be appropriate (as the platform is occupied by the coaches), or more often a shunt signal may be used.
edwin_m wrote:A semaphore main stop signal when clear indicates that the train can proceed as far as the next main stop signal, which in your case would be the Advanced Starter. However it probably wouldn't be cleared until the train stopped in the platform, in case the driver forgot there was another signal (and that his train was terminating!) and started accelerating away.
Indeed it would be contrary to Rule 39a to clear it until the train is close to it and the speed is clearly under control. Sometimes this is enforced by locking the signal until a timer has expired ("compulsory Rule 39a")