Al Jazeera has ceased broadcasting its Freeview HD version following the introduction of a new standard definition version on channel 235.
With the new version being on a different frequency, more viewers can access the channel of Freeview. The channel will continue to be available following the introduction of 5G mobile phone services, as the HD version of the channel was on a temporary frequency that is to be re-used for 5G.
Whilst reduction of picture quality is a downside, this is far outweighed by the boost in coverage area.