Curiously my wife didn't want to hang around a sewage farm on a sunny day...
so she went down to the beach whilst I attempted a few pics. Alas, the limitations of a 7' fence topped with three lots of barbed wire prevented me getting more ...
Also, there's a mass more undergrowth than in the general pics in entries above this. Still, here goes:
First, taken from the fenced plant looking towards the tunnel that runs under the ridge:
and from tunnel to fence:
camera squeezed through fence shows:
at the far (Solva town end) of the tunnel:
Looking from the far end into the tunnel there is a teasing glimpse of the loco some 50 yards in:
And that's it.