Used this interesting ticket 30 July 2019 “starting” the loop at Crewe and proceeding anti-clockwise to Shrewsbury. So not a full circuit but under the circumstances still a fun day out:
Horsham (HRH) 05:15 Victoria 06:12, Victoria Line, Euston 07:07 Crewe 08:41, 08:47 Chester 09:08, 09:23 Llandudno Junction 10:15, 10:28 Blaenau Ffestiniog 11:30, 11:35 Porthmadog Harbour 12:45, Porthmadog 14:02 Birmingham New Street 18:30, 18:50 Euston 20:15, Victoria Line, Victoria 20:55 Clapham Junction 21:01, 21:13 Horsham 21:58.
Thanks again to forum members for providing the "secret" codes to hand to the booking clerk at Horsham. A rare occurrence of raised eyebrow and a subsequent smile was the most animated I'd ever seen this particular clerk.