Greenuser:
I won’t tell my employer until I’ve passed my probationary period, if I decide to tell them. It’s not compulsory to tell your employer about all your medical issues
Brilliant! 
So according to you, you’re on the dole, getting valuable training for free and you’ll lie to trick a potential employer because you can’t do without drugs
I really hope you are just a troll, (although I’m tempted to say we couldn’t write this as fiction) if you were a real person you’d be so utterly reprehensible to have such arrogance to think your drug habit would be more important than a company who would be prepared to give a chance to someone who was long term unemployed. I just hope to God if you are real and not a scum-sucking Troll, that you don’t live anywhere north of Yorkshire.
As DCPCFML says, you’d be straight out of the door as soon as anyone has a whiff of your habit, because as has already been said, you’d be a gigantic liability - in that respect I wouldn’t call it “grassing” to drop you in it with the TM and company owners, more like being a responsible employee, because other drivers would know what you are stubbornly refusing to acknowledge - someone like you (if you were real) could cause a company to go bust.
Here’s a very real scenario: you somehow manage to pass your test (and there are no guarantees for anyone); some poor sucker gives you a chance to learn the ropes working for his company.
You are involved in an accident (it does not necessarily have to be your fault) where someone is injured, perhaps even killed. Police, looking for any reason to up the ante (that’s just the way they roll…) notice a particular odour around you, they give you a drug test (it’s as simple as wiping your forehead with a wet wipe), you test positive, you’re arrested, which is always a risk for HGV drivers, with or without drugs in their system.
You’re likely to be charged very quickly, and if someone has died or was seriously injured, you’ll very likely be put on remand at Her Majesty’s Pleasure, a bit of a shock to the system as you can imagine.
For you there will be a trial, and if someone did die you will definitely get a substantial dose of porridge, around three years is not uncommon for HGV related fatalities. Porridge is still a real liklihood even in the event of serious injury.
Meanwhile, the poor sucker you lied to will find their insurance company very easily weaseling out of any payments, because the company did not have a no-drugs-under-any-circumstances caveat in their employment contract. They’ll also get investigated by DVSA, and quite likely have to undergo a Public Inquiry with the TC (which is just a court hearing by another name) where they may have their O licence curtailed (ie the number of trucks they can operate is reduced) which means some of the drivers will be looking for other jobs (because of YOU), or the company will get its O-licence revoked, which means the company ceases to trade, ALL the drivers are now looking for new jobs (because of YOU).
Your name will be equivalent to something people wipe off their shoes. You’ll be lucky to get any type of job in the future, you certainly won’t ever drive a truck commercially again, and… newspaper reports may very well give your full name AND address, so if you didn’t get locked up, you might end up wishing you had, because some of those people who’s lives have been disrupted by your drug use may take it a bit personally and wish to have a quite word with you.
Still think lying about a drug habit is acceptable?
