Without wishing to sound in the least bit derogatory can I point out that I simply do not trust Boyd's writings about FR signalling and signal boxes. This page is a good first start but needs an awful lot of unpicking and correcting - I do not wish to criticise your good works Mark, but based on what I have beside me from the archives I would not use Boyd as a citeable source. In time I will write up my notes for each location with a fresh analysis of the original source materials. Mark - I have sent you a FB friend request and hopefully we can continue this discussion off-list. Marquis DeCarabas (talk) 02:56, 23 March 2015 (UTC)
If you are going to document all of these then some others that I can think of are:
Minffordd - Signal frame outside the booking office (more or less on the platform) before automation.
Penrhyn - Staff instruments (short and long section) in the goods shed.
Tunnel South Siding
Blaenau - The short lived modern automated system. Control panel and relays in room under water tower.