Under a dark grey sky, 37411 Caerphilly Castle accelerates away from Pontlottyn on 4 December 2005 with the 1Z33 12:15 Rhymney to Cardiff Central, with 50049 Defiance bringing up the rear. This was during the Arriva Trains Wales sponsored 'Loco Hauled Farewell' day, to mark the end of proper trains in the Welsh valleys.