Here is the signal box diagram for Ashton Moss South Junction, after it assumed control of Crowthorne Junction about 1970:http://www.lymmobservatory.net/railways ... th_q65.jpg
I also have another plan which gives distances and TC lengths (not scanned), from which we learn T3 was 440 yds long, T5 was 220 yds and T9 440 yds.
I understand the lengths for T3 and T5 - Absolute Block clearing points for semaphore and colour light distants, respectively. But what is the reason for T9 being 440 yds? It sounds like an AB clearing point but is not (unless Crowthorne acquired a colour light 8/9 before closure..)