Standing at Whimple station in Devon and looking towards London. The platform is only long enough for three carriages so a '3' sign reminds drivers of up trains where to stop and guards of down trains to use 'selective door opening' so that passengers don't step out into thin air.
<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>