Think of the children ,as its a 7.5 tonner it most likely doesnt have a retarder or any thing else to slow it down.The brakes and suspension arent intended to hold up and hold back 10 tons.ZB your bosses its your licence and your court appearance.
I’d talk to other drivers about it, try and get a concensus that the vehicles are being overloaded and point out how dangerous and illegal it is. Its much easier a group of people confronting a boss than one person.
If that boss is useless if you can take it higher up the food chain, explain your concerns and the legality of it.
I’d do these things before going anywhere near VOSA, because that’s a nuclear option. VOSA will target the drivers on the road, then the company if there is wrong doing, will be fines, court appearances and thats a bit dumb going down that route if some drivers can get together and go above that bosses head get things sorted out.
If these things aren’t possible i would just leave get another job and possibly inform VOSA.
alamcculloch:
Think of the children ,as its a 7.5 tonner it most likely doesnt have a retarder or any thing else to slow it down.The brakes and suspension arent intended to hold up and hold back 10 tons.ZB your bosses its your licence and your court appearance.
Where do you get the 7.5 tonner and holding back 10 tons bit? I’ve told you eighteen million times not to exaggerate!
1)Unless you have left out the bit where your boss has taken your family hostage and demanding you take these loads out or else…YOU are not being FORCED to do anything…he is just happy your daft enough to do so.
2)When DVSA pull you over or a traffic cop sits behind you and sees your overloaded and stops you your above excuse will mean ■■ all,your boss is sat in his office your driving the overloaded van,first thing your boss will say is “drivers responsible for the load”.
3)If you have an accident or are involved in a non fault accident the above will apply also because you are driving overloaded you are technically also driving without insurance because the policy will be void in the event of a crash.
Get a calculator,work out how many bags you can legally carry and load that amount leave the rest in the factory.
And when your boss calls you into his office be sure to,if you have one,activate the voice recorder on your phone…could prove useful when he sacks you and you take him to a tribunal.
Idiot.
put up or shut up…either leave or get on with it.sprinters have a gvw of 3500,but they still sit straight with 3 ton in the back,hence that’s why there getting loaded like that.either get on with the job,or jack it in. no point in bleating about it or grassing him in,though if you did,then why leave the door open for the retribution from him that would surely follow. chuck the job in,or get on with it and take your chances till you find a better job.
get it weighed
end of story
Kaistar:
They are not allowed to give a bad reference, all they an do on that score is refuse to give one.
That’s not strictly true. What they can’t do is lie. So long as what they’re saying is true they can pretty much say what they like.
In this case, I don’t see a problem, the OP is well within his rights to refuse to drive the vehicle. He obviously isn’t comfortable doing the job (neither would I) so informing the relevant authorities is the course of action I’d be taking.
First thing you must do is join a union,GMB,usdaw,or any will do.
then get a few photos, videos, 
Like already mentioned get the fully loaded van on a weigh bridge 
Then depends how far you want to take it,but usually the Health and Safety at Work poster (which must be displayed)at work will have a phone number on it,give very good advice.
Stand your ground ,no job is worth it,just be reasonable and refuse to take it out on safety grounds.
The boss may shout and scream ,but they always back down when you ask them to put it in writing and sign it.
Or you could just take the fully loaded van to police station,or vosa.really phu@ them.up 
ckm1981:
1)Unless you have left out the bit where your boss has taken your family hostage and demanding you take these loads out or else…YOU are not being FORCED to do anything…he is just happy your daft enough to do so.
2)When DVSA pull you over or a traffic cop sits behind you and sees your overloaded and stops you your above excuse will mean [zb] all,your boss is sat in his office your driving the overloaded van,first thing your boss will say is “drivers responsible for the load”.
3)If you have an accident or are involved in a non fault accident the above will apply
^ This.
Bearing in mind the fact that we don’t actually have any proof of the OP’s issues in the form of any weight tickets ‘if’ anyone is actually driving an overloaded vehicle all the above then applies.Up to the charge of causing death by dangerous driving. 
I am working somewhere that I can’t keep up with the same amount of drops/collections as everyone else. I have complained to the boss and he is not sympathetic.
I can tell by looking, and also from my boss being a bad man by being unsympathetic to my whining, that the vehicles are overloaded. I’ve heard snitching is frowned upon so I’m looking for some credulous people on the internet who take think of the children style drama queen hearsay at face value to tell me what I want to hear and help clear my conscience.
Yours
A future poster, telling anyone who’ll listen, how great the agency lifestyle is.
m_attt:
refuse to take it out, get sent home, repeat until sacked. claim unfair dismissal etc, and tell vosa.
+1
Own Account Driver:
I am working somewhere that I can’t keep up with the same amount of drops/collections as everyone else. I have complained to the boss and he is not sympathetic.I can tell by looking, and also from my boss being a bad man by being unsympathetic to my whining, that the vehicles are overloaded. I’ve heard snitching is frowned upon so I’m looking for some credulous people on the internet who take think of the children style drama queen hearsay at face value to tell me what I want to hear and help clear my conscience.
Yours
A future poster, telling anyone who’ll listen, how great the agency lifestyle is.
OAD you are a baaaaaaaad man! Love it!
Kaistar:
They are not allowed to give a bad reference, all they an do on that score is refuse to give one.
Not strictly true, but they have to be able to 100% prove what they put, so as said usually a refusal to give a refrence is a bad enough note.
**EDIT:**Dammit someone posted this almost identical before me
As above, if your that worried have it weighed and then take it from there.
I aint gonna even bother answering this one
Poll : Muppet or Lemming?
Either way you know what to do so why ask!! It’s illegal IF it’s overweight as you say it is so refuse to take it anywhere other than a checkpoint.
1- Walk and find another job with your intact licence whilst you’ve still got it
2- walk and report then look for a new job with your intact licence etc
You obviously know it can’t carry so don’t .
Im the boss. i want you to drive this van over a cliff… If you dont then you will get the sack…Would you ?
Its YOUR licence…If you loose it your sacked. You cant get work. If you leave you can get other work.
Every day i check the truck…If there is anything wrong with it, i will not drive it for work . I will drive it to get fixed and thats the only time ,
Its MY responsibility to tell the TM of any thing wrong.After that its his responsibility to do what he needs to do to get me back on the road
are you sure its a 3.5t
Janos:
Checkweigh, even if you have to pay for it yourself at a public weighbridge. If vehicle is grossly overweight, you are breaking the law. Take it back, and tell boss if he sacks you and gives you a negative reference you will take the weight ticket to VOSA and tell them what you have been expected to do.
dannyp78:
I am working for a company driving 3.5 ton sprinters and luton vans delivering laundry to hotels in sacks each one weighs in at 15 kg I leave the factory. Every day with between 150 and 200 sacks and return with the same most days I can’t get two fingers between the tyre and wheel arch I am carrying double the legal load yet if I protest I am told to go home and they will get someone who will do it they also want the laundry back asap so expect you to work 10 to 12 hours straight without breaks I’m getting very stressed out about it but feel I can’t leave as won’t be able to claim or they may give me bad reference don’t know what to do any advice ■■?
Here’s what i would do, not suggesting you do it as its probably illegal too, but great fun !! 
Go to the gov.uk website, download a copy of the DVSA logo, now insert it into a word document, and write a letter to your boss, as if its from the DVSA. Asking him to contact…[google for the name of a local enforcemnt officer], regarding vehicle overloading and excessive hours. Word it cleverley… Then, mail it to your boss . The letter should give him 7 days to contact the officer. Then hope he rings them and starts hanging himself. Do a real nice official letter with all the DVSA contact details, numbers, website address and email contacts on it
Disclaimer : Don’t really do it of course. Its a joke.