CaptainKirk:
I’ve done the same myself left my tacho card in overnight, 3 times. Done it twice, in the last 28 days. Done a printout, for the 2nd offence in late January of this year, but done it again, on Thursday eve, in to Friday morning, but didn’t do a printout, because I was ■■■■■■ off with the employer, etc, etc, which got me to forget about the printout, felt like giving up, plus a few other things. If I do a printout, on Monday AM, (tomorrow), as I start my shift first thing, would that count for an infringement last Thursday evening, because I was made to believe, that printouts should be done on the same day of the infringement, to show your state of awareness about the job, etc.
A printout should save you having to answer questions from DVSA if you get stopped but I doubt it will prevent your company giving you an infringement notice to sign.
Sent from my mobile.