Tarmaceater:
If you do go over , don’t worry, it’s only an infringement at your base and sign it , DVSA won’t prosecute over this matter as you are not committing tachograph fraud but if you have to go over 15 , leave the card in , don’t move without your card in .
You’re breaking the law. It’s not the going over the 15, it’s having insufficient daily rest and yes they do prosecute over this - they may turn a blind eye to a few minutes and give you a slap on the wrist, half an hour they won’t. Get stopped any time in the next 28 days at a checkpoint and when they download your card it’s bye-bye a day’s wage at the least.