Carry digicard at all times?

El Deano:
Drivers’ hours and tachographs: buses and coaches - 3. Mixed EU/AETR and GB domestic driving - Guidance - GOV.UK

Section 3.4 Records

Is this whst your after?

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Thanks, so, as I read it, when driving on uk domestic rules(which most service buses do) no need to have digcard card with you.