Re: did you actually mean ham listening?
DAB is a crap Ghetto of over compressed poor coverage and inherently rotten ergonomics. It economically gives unfair advantage to national stations.
Ordinary people (the Majority using Radio) do still use FM Radio, very many use MW & LW, which allows reception of out of local area local & regional. Some people even listen to UK radio outside UK, or non-UK radio in UK on LW, MW and SW.
The newest Power line specs affect VHF-FM.
AM, FM, broadcast of any sort or "Ham" (which is licensed) is supposed to be protected by the Regulator and International treaty.
See how quick Ofcom would be to enforce EXISTING law (no new regulations needed), if their friends, the big cash cows, the Mobile Operators were affected!
Ofcom don't care even about protecting FM. They want in fact to abolish TV Terrestrial Broadcasting. There isn't even ANY other application to sell off the AM and FM bands to.
DAB only promoted for the Motorist, even though VHF-FM is actually "better" in many respects. But decent DAB needs 100s more fill in Relays, too expensive for small local stations and needs twice as many multiplexes, at least to give decent bit rate. Even then it's only good for a car radio presets. Digital Radio inherently has terrible ergonomics.
Have Corporations got the right to ride rough shod over existing consumers, Regulators the right to ignore their own laws, because it not a Mass Market, not Subscription based or not huge Licence revenue?