For about eight months I was doing a four-day week at a yard near Immingham and picking up agency shifts at the weekend. Different TM, different yard, different work. One operator running bulk tankers, the other doing general haulage out of a Scunthorpe RDC. Both legitimate. Both above board.
Neither of them had any idea what the other was sending me out in.
The tacho didn't care. It records everything on the card, regardless of which vehicle you're in, regardless of who's paying you, regardless of which yard you started from. And the combined picture — 56 hours of driving a week, 90 hours in the fortnight — applies to you as a driver. Not to each employer separately.
I nearly ran over my weekly limit three times before I worked this out properly. The fourth time I actually did. Picked up a graduated fixed penalty at the M62/M18 junction stop. Neither operator accepted it was their fault. Technically, they were both right.
How the card sees it
Your tachograph driver card doesn't record which operator you're working for. It records your driving activity — mode, time, distance — and it does that regardless of which vehicle you're in. When you insert your card into a vehicle, the card picks up where it left off.
So if you drove 4.5 hours at yard A in the morning, went home, and then put your card in at yard B that evening, the second vehicle sees 4.5 hours of accumulated driving. It doesn't know about yard A. It knows because the card knows.
The accumulation rules under EU 561 are personal. The 9-hour daily driving limit, the 10-hour extension (twice a week maximum), the 56-hour weekly cap, the 90-hour fortnightly limit — all of these apply to the driver. Not to the employment relationship. Not to the operator. To you.
That sounds obvious once someone says it. But a lot of drivers working multiple employers don't realise it until something goes wrong.
Where the combined hours problem actually bites
The most common scenario is exactly what I was doing. Full-time main employer Monday to Friday. Agency shifts on Saturday and Sunday. Main employer thinks you've had two days off. Agency thinks you're fresh. But your card shows 45+ hours from the working week already on it.
Under EU 561, the weekly limit is 56 hours. The fortnightly limit is 90 hours. Pick up a 9-hour shift on Saturday and another on Sunday after a 40-hour working week, and you're at 58 hours — a serious infringement, not a minor one. DVSA infringement severity is based on the size of the breach, not the reason for it. "I was working for two different companies" isn't a mitigation. The numbers are what they are.
The fortnightly limit bites in a slightly different way. 90 hours across 14 days. If you're doing 40 hours a week at your main employer and picking up 10 hours a week in agency shifts, that's 100 hours across a fortnight before you've even pushed any 10-hour extensions. That's a 10-hour overage. Serious category.
I'm not picking unusual numbers here. 40 hours a week of driving is well within what full-time yard drivers do. And 5 hours a weekend in agency shifts is modest. Together, they breach the fortnight rule.
Who carries the infringement?
Both operators have obligations under EU 561. Article 10 requires them not to give incentives that encourage rule-breaking, and they must organise work schedules that allow drivers to comply with the regulations. But neither obligation is violated if the operator simply doesn't know about the other employer.
In practice, the graduated fixed penalty lands on the driver first. If it goes further — if it triggers a prosecution — the operator may also face charges if they can be shown to have known (or should have known) about the combined hours. But establishing that is more complex. The driver is the primary liable party at the roadside.
The infringement also goes on the driver card. Which means when either operator downloads the card and runs an infringement analysis, it shows up. Both of them can see it. Neither of them can claim they didn't know after the download.
The practical reality is that the infringement is yours to manage. You're the one who knows both operators' schedules. You're the one who knows the combined hours picture. The operators are running their own operations — they don't have access to your other employer's records, and they don't have a legal duty to obtain them.
What both operators are supposed to do
EU 561 requires operators to keep records of drivers' working time and to check that the rules are being complied with. But that obligation only covers the driving done for them. An operator at yard B can only see yard B's records, plus whatever's on the driver card from the last 28 days when they download it.
If they download promptly — within the 28-day cycle — they'll see the driving from yard A on the card data. A good tacho analysis system will flag the combined picture. But a lot of small operators don't run sophisticated analysis. They do a manual check on the card printout and look for obvious infringements against their own dispatch records. They're not necessarily looking for patterns that involve a second employer.
Some operators ask drivers to declare additional employment at induction. Some don't. If you're asked and you say nothing, and then an infringement is found that involves combined hours from two employers, that's your problem — not the operator's.
The manual entry obligation
There's a specific record-keeping rule that matters here. Under Article 34 of Regulation (EU) 165/2014 (the tachograph regulation), drivers must make manual entries for any period of "other work" or "availability" that isn't recorded by the tachograph. If you do any work between the two employer shifts — including time at the wheel in a personal vehicle doing work-related travel — that may need to be recorded.
For most dual-employer drivers, the practical issue is simpler: your card records driving at yard A, shows the mode changes (rest, availability, other work) in between, and then records driving at yard B. The accumulated driving time is visible. The combined hours picture is there. There's no hiding from it.
What you can do is manage it. Know your hours before you accept the agency shift. Calculate the fortnightly total before you agree to Saturday morning. I've seen drivers pull out a Saturday agency shift by midday on Friday because they did the maths and realised they'd have been over before they started the day's run. That's not awkward — that's good compliance management.
Telling your operators what they need to know
You don't have a legal duty under EU 561 to proactively disclose additional employment to your operators. But you have an obvious practical interest in making sure neither of them sends you out in circumstances where you'd be in breach before you've turned a wheel.
The simplest approach is to keep a running total yourself. By Wednesday of each week you should know roughly where your weekly hours are sitting. By the end of week one, you should know where your fortnightly total is starting. Agency dispatch calls you Friday afternoon for a Saturday shift? You need to know the answer before you say yes.
ShiftOwt was built around exactly this kind of combined tracking — the app tracks EU 561 and WTD compliance automatically for £5.99 a month. If you're working across multiple operators, it gives you a single view of your hours position before you accept a shift, not after you've already driven it. Agency pricing is available on request.
The question of records
Both operators have to keep your tachograph records for a minimum of 12 months under EU 561. That means when DVSA ask operator A for the last year's records, they'll produce what they have — your driving for them. But if DVSA are investigating an infringement, they're going to look at the card data as a whole, which shows everything.
You can be investigated by either operator's DVSA encounter. An OCRS hit on operator A can trigger a premises inspection that then looks at all drivers' card data. If that card data shows combined-hours infringements involving a second employer, operator A may escape the worst of it — but you don't.
This isn't a reason not to work for two employers. It's a reason to manage the hours properly. The rules aren't designed to prevent multi-employment. They're designed to prevent driving while fatigued, regardless of how many payslips you've got.
Practical steps before accepting any additional shift
Check your card before you agree to anything. Know your current week's driving hours. Know your fortnight total. Calculate whether the shift you're being offered — including any driving to and from the yard — would take you over either limit.
If you're close to the 56-hour weekly cap, you don't take the shift. If you're close to the 90-hour fortnight, same answer. The agency doesn't know your other employer's schedule unless you tell them. You know. Make the call yourself before they make it for you.
Working for two operators on one card is legal, common, and sensible for a lot of drivers — especially agency workers filling up the gaps in their week. It becomes a compliance problem when neither party has the full picture. That's your job to manage.
What happens at a roadside stop with combined-hours infringement
DVSA pull you into a check site. They download your card. The infringement report flags a weekly hours breach — 61 hours in a week. The DVSA examiner asks about it. You explain you're working for two operators.
This doesn't get you off the hook. The infringement is real regardless of how many employers contributed to it. What it might affect is the graduated fixed penalty amount — the examiner has some discretion about whether to issue a GFP, a formal warning, or a Traffic Examiners notice depending on the circumstances — but the breach is still a breach.
If the breach is serious (more than 10 hours over the weekly limit, typically) it moves into a different penalty band. If it's a very serious breach — more than 20 hours over the weekly limit across a fortnight — DVSA might recommend the matter for prosecution rather than issuing a fixed penalty. In that case, both the driver and potentially the operators are referred for investigation.
The operators both get a compliance notice at minimum. DVSA can look at the records from both operators to establish who sent you out when, and whether either of them should have known about the combined hours picture. A transport manager who downloads your card, sees the other operator's driving in the data, and does nothing about it is harder to defend than one who genuinely had no visibility of the other employer's schedule.
The specific scenario to watch for: weekend agency work
The highest-risk pattern is straightforward: full-time yard driving Monday to Friday, agency work on Saturday or Sunday. It's incredibly common. And it's almost never flagged as a potential compliance issue at induction.
The main employer thinks you're on two days off. The agency thinks you're fresh. Your card knows you've already done 40 hours this week.
If your main job is pushing toward the weekly limit — some runs do 11 or 12 hours of driving in a day, and five of those days is 55–60 hours — even a modest agency shift tips you over. A 7-hour agency shift on Saturday after a 45-hour driving week puts you at 52 hours. That's still within the 56-hour weekly cap. A 7-hour agency shift after a 50-hour driving week puts you at 57 hours. That's a breach.
The fortnightly calculation is harder to track mentally. 90 hours across 14 days sounds like a lot until you're doing 45 hours a week plus 5-10 hours on weekends. Over two weeks that's 100–110 hours. A 10–20 hour fortnight overage is a serious infringement.
Check your numbers on a Thursday afternoon before you agree to a Saturday shift. It takes five minutes. And it's a far less embarrassing conversation with the agency to say "I can't do Saturday, I'm close on my hours" than to explain the GFP to your main employer on Monday morning.