This service started on Saturday 31st July and I went to observe the two buses being used.
There are two operators Llew Jones of Llanrwst and Cerbydau K&P Coaches of Anglesey each providing one of the two buses required to offer the 2 hourly service. Both vehicles are Optare Tempos provided by the Welsh Assembly Government. They were both new in 2013 and were used on the T9 Cardiff airport service until April 2020. They have been recently refurbished and given the new TrawsCymru livery. 
YA13AAF being operated by K and P Coaches seen on its first visit to Corwen on the first day.
Llew Jones operated Tempo YD63UZM arriving at Betws-y-Coed from Bangor on its way to Corwen
The inside of the newly refurbished Tempos