Here is my attachment to compare presentation to your orginal.
I think I had too large a file size before.
Note that I have assumed that signals 11,15 and 13,17 all exist.
Actually because there are slower speed diverging routes from 15 & 17 it isn't enough just to say the rear signals cannot clear until the forward signals are off, as these themselves would have to be approach released.
Potentially could make the condition as "ready to clear" rather than "off" but that is a complication best avoided at this stage of learning.
Hence I have given 11 & 13 yellow aspects which would themselves need to be approach released (but note that their Greens would be shown when 15/17 showing Green and would NOT be approach released) because of the underbraking. However as stated in earlier reply, better not to have all those signals.
Conversely since 15/17 to 21 is overbraked then I have assumed that for the branch that the 3 aspect signals do not show their yellow and that there is an extra signal 19 to act as a distant for 21.
Modified attachment to show the A/R for 11 & 13 more clearly
I think I had too large a file size before.
Note that I have assumed that signals 11,15 and 13,17 all exist.
Actually because there are slower speed diverging routes from 15 & 17 it isn't enough just to say the rear signals cannot clear until the forward signals are off, as these themselves would have to be approach released.
Potentially could make the condition as "ready to clear" rather than "off" but that is a complication best avoided at this stage of learning.
Hence I have given 11 & 13 yellow aspects which would themselves need to be approach released (but note that their Greens would be shown when 15/17 showing Green and would NOT be approach released) because of the underbraking. However as stated in earlier reply, better not to have all those signals.
Conversely since 15/17 to 21 is overbraked then I have assumed that for the branch that the 3 aspect signals do not show their yellow and that there is an extra signal 19 to act as a distant for 21.
Modified attachment to show the A/R for 11 & 13 more clearly
PJW