Broadcast SAP/MTS isn't a UK thing (as far as I'm aware), but as far as I understand it also depends on how the broadcaster's embedded MTS/SAP signal is at any given time - which may explain the language switching.
Broadcast SAP/MTS isn't a UK thing (as far as I'm aware), but as far as I understand it also depends on how the broadcaster's embedded MTS/SAP signal is at any given time - which may explain the language switching.