This is the optimum journey pattern that is achievable within the overall target of journey times between Holyhead and Cardiff, via Wrexham, of some 4 hours and 17 minutes.
Dyma’r patrwm gorau y gellir ei lunio ar gyfer teithio o fewn targedau amseroedd rhwng Caergybi a Chaerdydd trwy Wrecsam, sef oddeutu 4 awr ac 17 munud.