GB Domestic Drivers’ Hours vs Assimilated Rules: Which Apply?

Two frameworks, not one soup

In Great Britain, goods vehicle work usually falls under one of these frameworks:

• Assimilated drivers’ hours rules (Regulation (EC) 561/2006 as it has effect) — tachograph, 4.5h breaks, 9/10h daily driving, daily/weekly rest patterns, 56/90, etc.
• domestic drivers’ hours rules (Transport Act 1968 as amended) — for many journeys that are out of scope / exempt from the assimilated rules

This article explains which framework you are in at a practical level. It is not a full exemption catalogue and not a mixed-driving deep dive.

Assimilated rules — the default for most HGV tachograph work

If you drive a goods vehicle in scope of assimilated rules (typically over 3.5t MPM including trailer where the rules apply), you use a tachograph and the familiar EU-derived limits. UK–EU journeys and most mainstream hire-and-reward HGV work sit here.

domestic rules — when assimilated rules do not apply

Some operations are exempt from assimilated rules. Those drivers may instead sit under domestic limits. In broad driver-facing terms, domestic rules centre on:

• maximum 10 hours driving in a working day
• maximum 11 hours duty in a working day (with specific domestic exemptions from the duty limit in defined cases)
• record-keeping duties that often mean a weekly record sheet (or a compliant tachograph used to keep the required domestic record)

Domestic rules do not copy the assimilated 4.5h/45min break table or the 11/9 daily rest system. Employers still have working-time “adequate rest” duties under the Working Time Regulations 1998 for domestic-scope drivers.

How to think about it as a driver

1. Is this vehicle/journey in scope of assimilated rules (tachograph EU-derived limits)? → follow assimilated rules.
2. Is the operation exempt so assimilated rules do not apply? → your company should tell you that you are on domestic rules and which records to keep.
3. Do not invent a hybrid (“I’ll use domestic 10h driving but skip domestic records”).

Northern Ireland / abroad

domestic rules are a Great Britain framework. Other jurisdictions have their own national rules. Crossing borders does not let you keep driving on a domestic assumption if the journey has put you into assimilated/AETR territory.

Driver habit

If your work sometimes uses exempt vehicles or specialist operations, get a written note from the operator: assimilated or domestic for this duty? Guessing at the roadside is how people produce the wrong record for the rules they were actually under.