How to tune to Long Wave broadcasts like Test Match Special
Flexibility within the DAB system means that part-time 'secondary services' can be created to allow broadcasters to transmit extra programs. Radio 4's LW output is transmitted as a side channel to Radio 4's main output. Yesterday In Parliament and The Daily Service are broadcast on DAB in this way. Similarly, Five Live Sports Extra allows Five Live to double its live sports coverage at certain times and is the digital radio home of Test Match Special.
To access 'secondary services' you need to tune in when the service is actually broadcasting. That way your radio will store the station in its memory. Check your radio user guide for details on tuning to secondary services.