The goods shed at Perranwell station, on the Falmouth branch in Cornwall, had a single siding inside but two openings in the wall allowed access to wagons parked on another siding outside. This picture shows the shutter and wheel of one of these.
<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>