The rock island line ...

or maybe Arriva Trains Wales, from Aberystwyth.
Lousy picture taken with my phone ... Which I dropped in the toilet this morning (luckily clean & full of disinfectant - but still not exactly good for it - currently not ringing or any other sound).
Good teaching session but I'm knackered. Not got the stamina I used to have ... Anyway now on (4 hour) train journey home.