UK Driver Hours Rules 2025: What Every HGV Operator Must Know

If you run a haulage business or manage a fleet of HGVs, keeping on top of driver hours rules is non-negotiable. Get it wrong and you're looking at heavy fines, vehicle immobilisation, or worse — a review of your operator licence. The good news is that the core rules haven't changed dramatically, but the DVSA has rolled out some important updates that came into effect in April 2025, and there are further deadlines coming later this year. Here's what you need to know to stay compliant and keep your drivers on the road.

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The Core Driver Hours Rules (Still the Foundation)

UK HGV drivers operating vehicles over 3.5 tonnes follow what the DVSA now officially calls the assimilated drivers' hours rules — previously known as the retained EU rules. The terminology has changed post-Brexit, but the limits themselves remain the same.

Here's a quick breakdown:

• Daily driving limit: 9 hours, extendable to 10 hours on up to two days per week
• Weekly driving limit: 56 hours maximum in any single week
• Fortnightly limit: No more than 90 hours across any two consecutive weeks
• Breaks: After 4.5 hours of driving, drivers must take a 45-minute break — this can be split into a 15-minute break followed by a 30-minute break

These aren't suggestions. They're hard limits designed to reduce fatigue-related incidents on the road, and DVSA enforcement officers check digital tachograph data at roadside inspections to make sure they're being followed.

If you're not already tracking these figures in real time, tools like Fleet77 can flag when a driver is approaching their limits — which is far better than finding out at the roadside.

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What Changed in April 2025

The DVSA updated its drivers' hours guidance on 21 April 2025, and there are a few key changes that operators running international routes need to pay close attention to.

1. The 56-Day Record Requirement

This is probably the biggest practical change for day-to-day operations. Drivers on international journeys are now required to produce 56 days of tachograph and driver records at roadside inspections — up from the previous 28-day window.

That means your drivers need to carry, or have accessible, two months' worth of data when crossing borders. If your tachograph management process only covers 28 days, it's time to update it. DVSA's own Earned Recognition audit standards make clear that operators are expected to have robust systems in place for downloading, storing, and reviewing tachograph data — so this change raises the bar for what "good" looks like.

2. Smart Tachograph Version 2 Retrofit Deadlines

If your vehicles are doing international work and currently fitted with a Smart Tachograph Version 1 (SMT1), you have until 18 August 2025 to retrofit to Smart Tachograph Version 2 (SMT2). That deadline isn't far off, so if you haven't already booked your vehicles in, now's the time.

For smaller vehicles — those with a Gross Vehicle Weight between 2.5 and 3.5 tonnes — that are engaged in international transport, the SMT2 deadline is 1 July 2026. Worth getting ahead of that one rather than leaving it until the last minute.

3. AETR Rules for Non-EU International Journeys

The updated guidance also clarifies that AETR rules (the European Agreement Concerning the Work of Crews of Vehicles Engaged in International Road Transport) apply to journeys between the UK and non-EU countries. This matters for operators running routes into countries like Norway, Turkey, or other non-EU AETR signatories. If your drivers are heading to these destinations, make sure your compliance process reflects AETR requirements specifically.

4. Terminology Update

The DVSA has formally replaced all references to "EU rules" with "assimilated drivers' hours rules" across its guidance. This is largely a labelling change, but it's worth updating any internal documentation, driver handbooks, or training materials to use the correct terminology. It signals that your business is keeping pace with current regulatory language — something that matters during audits.

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Enforcement: What Happens When Things Go Wrong

The DVSA isn't shy about enforcing these rules, and the consequences of getting caught out can escalate quickly.

At a roadside check, officers can issue fixed penalty notices of up to £1,500 for multiple historical breaches found in tachograph data. That's per driver, per inspection — so a busy fleet can rack up significant costs fast.

Repeat or serious violations can lead to:

• Vehicle immobilisation — your truck isn't going anywhere until the issue is resolved
• Mandatory court appearances — particularly for deliberate or systematic breaches
• Operator licence reviews — where your Traffic Commissioner examines whether your business is fit to hold a licence

Transport managers are also in the frame. DVSA compliance audits look at whether internal systems are genuinely preventing driver fatigue, not just ticking boxes. The DVSA Earned Recognition audit standards set out exactly what examiners expect to see — including regular tachograph analysis, driver debriefs, and clear escalation processes when infringements are found.

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Practical Steps for Operators Right Now

Here's a straightforward checklist to make sure you're not caught out:

• Audit your tachograph storage — are you retaining and reviewing 56 days of data for international drivers?
• Check your SMT1-fitted vehicles — book retrofit appointments for any doing international work before 18 August 2025
• Review your driver documentation — do your handbooks and training materials reference "assimilated rules" rather than "EU rules"?
• Check your international routes — if you're running to non-EU AETR countries, make sure your drivers understand those rules apply
• Review your infringement process — when a driver hours breach is flagged, is there a clear process for investigation and sign-off?

Fleet77 is built around exactly these kinds of compliance checks, helping transport managers stay on top of tachograph data, driver records, and infringement tracking without drowning in spreadsheets.

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Driver hours compliance isn't the most exciting part of running a haulage business, but it's one of the areas where gaps show up fastest under scrutiny. With the April 2025 updates now in force and the SMT2 retrofit deadline approaching fast, there's no better time to make sure your processes are solid.

Try Fleet77 free or get in touch to see how it works.