I'm pretty sure there already are two stops at Coombe. Coming from Looe the train stops short of the points and the guard leaves the train at that point to operate the ground frame. There is then a second stop once over the points. Coming from the Liskeard direction its the reverse with the first once already over the points and a second stop once on the Looe branch.
You're right and I was wrong.
Here's the local instruction from the Sectional Appendix -
GW640 - LISKEARD TO LOOE VIA COOMBE
COOMBE To LOOE
The "One Train Working" staff for the Coombe-Looe section must be held by the Driver of trains for Looe when proceeding between Liskeard and Coombe, in addition to the "No Signaller" token.
The points leading to the Coombe-Looe section are controlled by Coombe No.1 ground frame which can only be released by both the "One Train Working" staff and "No Signaller" token.The normal position of the ground frame is with the points set for movements between Liskeard and Coombe.
On arrival at Coombe of trains from Liskeard the Guard must obtain the staff and token from the Driver, reverse the ground frame points and authorise the Driver to proceed onto the Coombe-Looe section. The ground frame must then be replaced to the normal position, the token placed in the intermediate token instrument and the staff returned to the Driver.
Trains from Looe must be brought to a stand at the "Stop" board at Coombe No.1 ground frame. The Guard must obtain the "One Train Working" staff from the Driver and "No Signaller" token from the intermediate token instrument, reverse the ground frame points and authorise the Driver to pass the "Stop" board.
The Stop board on the approach from Looe is equipped with TPWS. The Guard must additionally check that the steady blue TPWS status light shows on arrival at the Ground Frame from Looe. After withdrawing the token and reversing the points, the Guard must ensure that the blue light flashes to indicate that TPWS has been correctly suppressed. lf the blue light does not show, or it does not flash when required, the TPWS equipment must be treated as failed. The Guard must report the defect to the Signaller and advise the Driver. The Driver must operate the Train Stop Override in the cab before passing the Stop board.
Failure of train and assistance required. The "One Train Working" staff must be conveyed by the quickest means available to Coombe for the operation of No.1 ground frame.
Dated: 05/08/06