DAB coverage is a real problem. Across large parts of the country, the DAB signal is patchy, even along major roads. None of the receivers that use a whip antenna work indoors here (Devon), and even with an external antenna, signal quality is variable; this s compounded by the limited range of receivers that have an external antenna connector.. In the cars, which have modern, factory-fit DAB radios, DAB stations drop out regularly.
If Ofcom and the broadcasters want to promote a wholesale switch to DAB, the ball’s in their court to improve signal coverage.