As said, cover your arse by doing two printouts and write the explanation on both of them, hand one in when your card is downloaded, you’ll still get an infringement notice to sign but at-least your boss will know you’re aware of the rules, keep the other printout with you in case you get pulled into a road side checkpoint, the printout will show that you’re aware of the rules but just got caught out on this occasion.
There won’t be any repercussions from the DVSA and apart from having to sign an infringement notice there should not be repercussions from your company either 