Right… So you’ve been off now for is it 3 weeks on full pay?..ok.
Presumably they are continuing to pay you until they complete their… ‘‘investigation’’
(presumably carried out in a room with an ivory tower
)
What tf is there to ‘‘investigate’’ exactly? 
It aint the crime of the century,… nobody died ffs.
So you (inadvertantly) ran with a dodgy tacho,
''quick set up the gallows now ! '.
…
You then played the inexperience card, as a defence, and claimed you genuinely thought you were covered, and explained why you thought that…
All of which imo are fair enough and an adequate explanation…
So again what is to investigate taking 3 to 4 weeks to do so ??
Sorry mate, I’ve probably been in this sh. industry a bit longer than you, so I find it very hard to take these ‘‘Up their own arses type firms’’ at all seriously.
I also despise the type of pompous type ‘nonjob’ pricks who work there and do all this stuff to their drivers.
In my view as an ex employer of drivers, when they discovered this, they should have got you in the office and either…
Give you both advice and a bollocking, and a quick…‘‘Don’t do it again son’’.
Or …
Instantly sacked you, no in betweens and certainly not all this over the top self important bull crap of keeping you waiting for their …oh sooo important decision on your future.
The words ‘mountain and molehill’ spring to mind.
So… What is the worst they can do?
They are paying you to sit on your arse at home, all good so far.
if it was me I would be spending most of that time enjoying it, certainly NOT sat worrying, and part looking for potential other jobs to go to if they bullet you, to cover my arse…maybe a couple of interviews.
How important is this job to you exactly?..especially judging what type of people you work for.
These crappy firms with ideas above their station only do as much of this type of crap as drivers allow them to…fact.
So…
On the day of their ‘‘verdict’’
…I would be playing their game and rocking up for my ‘‘talking to’’ doing my best to appear to show respect, and pulling the right faces and making the right noises.
Then when they say I can ‘‘keep my job’’ say ‘Thank You’’ walk out feeling smug.
Always best to make them THINK they have won, it helps them justify their non jobs.
On other hand if they decided to ‘‘Let me go’’ I’d break out into a big grin and say ‘‘I cant work anymore with you pompous ■■■■ s any longer anyway, thanks for the x no of weeks full pay,.and swivel on that’’
And swagger out head held high into my new job never giving them a second thought.
Good advice…take it or leave it.
Good Luck mate
NIL ILLEGITIMI CARBORUNDUM.!!!