ADR course, driving working hours

No, don’t put in your card. Doing that opens up the very real possibility of screwing up the manual entry and ending up in infringementsville. Being as you’ve paid for it yourself and are also taking holidays for the duration my advice would be to stay schtum. DVSA have way bigger fish to fry than some guy who’s sat in a classroom. If you feel the need to record it then do it in a diary if you must by writing something along the lines of “ADR 8 hours” , nothing more, nothing less.