LL57, the signal which controls down trains leaving Lostwithiel, is a standard Great Western-style lower quadrant semaphore but the ladder has been changed to meet modern safety considerations. The higher (main) arm is for trains heading westwards towards Par and Penzance; the lower (subsidiary) arm is for trains diverging left to Fowey.
<a href="//commons.wikimedia.org/wiki/User:Geof_Sheppard" title="User:Geof Sheppard">Geof Sheppard</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>