I usually describe these Trainspottings as a 'day in the life'. In this case, I took it rather literally. 24 hours of comings and goings at Tidmouth, from the first train, to the last.
And no. I don't know how Gordon gets back for the morning.
Or why the fence jumps.
Maybe it's moles.
That would explain how Gordon made it back so quickly, with their underground tunnels.
Wouldn't it?