Fixed penalities for Tacho Infringements

How long can vosa go back on your tacho for any imfrimgements if your stopped.
As one of our drivers last week drove for almost 11.hours. he was called In office signed a form.
His reason was he was 40.mims.from.the yard and did,nt really want a night out as he didn’t feel to good.
Just curious if he was stopped how far can vosa go back issue a fine.
And 2nd
Would he of been better off just ejecting his card and driving back?
Which one would be the best to do ?