Actual speed is probably 75 (easily achieved with a bit of weight and a decent downhill stretch) and whilst a modest overspeed infringement isn't a big deal, using lane 3 to do it is, and the investigation has obviously highlighted other offences.
Company disciplinary action depends on the company, but generally, they're more concerned about timekeeping (turning up to work on time) and repeated accidents than the occasional overspeed.
Isn't an offence, in any way shape or form... Don't believe what your CPC trainer told you,
I know
Repeated minor blips are one thing, but repeated occurrences over distances of several miles can highlight company and driver trends.
There are circumstances that may prevent you from repeatedly braking down a long descent, or having misjudged the angle of a slope left it too late to change down, especially if you have a single range box, leaving you no choice but to let the engine hold you back in the gear that your in, M40 north from Wycombe being a good example.
However, showing significant blocks of time spent over 60mph (the actual HGV motorway limit) is asking to be called in to the office.
Depends were you work, and how they Annalise the download, as said big plobber company, going over 54.1mpj gets you a warning, as does ticking over for 31 seconds,,, management, bolloks,
If Dvsa see continues overspeed for miles, they will ask for limiter check, the Dvsa accept downhill overspeed when they download,...
If you work for a proper firm, overspeed dosent even figure, so when coming downhill, just let the autobraking keep it in check, mines set at 100, and it just bobs downhill no problems, until a Muppet starts braking because he gone over 54.1 for 2 seconds,...
Watching that video, tipper. Is downill, just letting it go, and took third lane, because of people plobbing along in lane 2... Just some dash cam warrior didn't like it.... Also to many "expert's"