 Moel-y-Parc's UHF channel allocation made it a "Group B" transmitter, but with the roll-out of the UK's first digital TV services in 1998, a "Group W" wideband aerial was needed.The site reverted to being a "Group B" transmitter at digital switchover (DSO).Technically, with the advent of the temporary MUXES 7 and 8 Moel Y Parc became a K group, and is due to remain so at its 700MHz clearance.