158820 in October 2018, minus its Arriva sticker (which I noticed) but still with the old Transport for Wales logo (which I didn't), seen a few days after the change of franchise for Wales took effect. (Thanks to the train driver for correcting the information I gave in the previous caption).
Location: Porthmadog
Original line: Aberystwyth and Welch Coast Railway
Photographer: Colin McDonald
Contact photographer: Colin McDonald
Date: 17/10/2018
Image number: 66034