A signed induction sheet or toolbox talk record can show that information was delivered, but it does not necessarily prove that it was understood. Recent research highlights how accents, jargon, background noise, time pressure and workplace culture can all weaken safety communication. For construction employers, the important question is whether workers can understand and apply the controls when conditions change.
Why a nod can be misleading
On 13 August, IOSH published an article examining language and cultural barriers in UK construction safety communication. The research behind it involved semi-structured interviews with 18 migrant construction workers, supervisors and managers.
One of the more useful findings was that communication difficulty is not simply about whether somebody speaks English. Accents, speed of speech, slang, colloquial expressions, background noise and the mental effort required to process instructions while working can all affect understanding.
The research also identified a difference between someone appearing to comply and genuinely understanding why a control is needed. A worker may copy colleagues, nod at a supervisor or perform a familiar task correctly without necessarily knowing how to react when the situation changes.
That is a particularly important distinction on construction sites, where changing access arrangements, plant movements, simultaneous operations, weather, deliveries and alterations to the sequence of work can quickly make yesterday’s instructions incomplete.
What does the law actually require?
This is not a new legal requirement created by the IOSH research.
Section 2 of the Health and Safety at Work etc. Act 1974 already requires employers to provide the information, instruction, training and supervision necessary, so far as is reasonably practicable, to protect employees.
Under CDM 2015 Regulation 13, the principal contractor must ensure that a suitable site induction is provided. Contractors also have duties under Regulation 15 to provide workers under their control with appropriate supervision, instructions and information so that construction work can be carried out safely.
HSE’s site rules and induction guidance goes further in practical terms. It says site rules should be clear and easily understandable and that the need for translated rules for non-English-speaking workers should be considered.
HSE also makes an important point in its guidance on migrant workers: health and safety law does not require workers to speak English. What matters is that work instructions, risks, precautions and emergency procedures are communicated in a way workers can understand.
Language is only one part of the problem
It would be a mistake to treat this solely as an issue affecting migrant workers.
A native English speaker can misunderstand an instruction because a supervisor uses technical jargon, talks too quickly, gives several instructions at once or delivers a briefing beside running plant where half of it cannot be heard.
New or inexperienced workers can also lack the context needed to understand abbreviations and site terminology that experienced personnel take for granted.
HSE’s guidance on safety-critical communications recommends considering who needs the information, the method used to communicate it, when it should be delivered and whether the language is appropriate to the workforce’s literacy and first language. For particularly important information, HSE suggests considering more than one communication method.
That might mean a verbal briefing supported by a drawing, photographs, a marked-up logistics plan or a physical demonstration rather than relying on several pages of written RAMS alone.
The risk should therefore be treated as a communication-system issue, not automatically as a weakness in the individual receiving the information.
How can supervisors check that people really understand?
Simply asking “Do you understand?” is not a particularly strong test.
Most people will say yes, particularly in a group. Someone may not want to admit that they did not understand the supervisor, may feel embarrassed asking for repetition or may not realise that they have misunderstood the instruction in the first place.
IOSH’s recent article recommends checking understanding by asking workers to explain or demonstrate the activity in their own words. HSE similarly advises employers to check that workers fully understand the information and training they receive.
In practice, a supervisor could ask:
- “Talk me through how you’re going to do this.”
- “Where is the exclusion zone?”
- “What would make you stop the job?”
- “What happens if this access route becomes blocked?”
- “Show me where you’re going to attach that.”
- “Who do you contact if the conditions change?”
Those questions test practical understanding without turning the briefing into an examination.
For a safety-critical task, asking someone to physically demonstrate the important step can be even more effective. The objective is not to catch people out; it is to discover misunderstanding before the work starts.
Make inductions and toolbox talks easier to understand
HSE recommends using plain, simple language when delivering induction and job-related training. Its guidance also suggests options such as interpreters, bilingual colleagues, buddy systems, videos, audio, recognised signs, symbols and hand signals where language differences exist.
On a construction site, that can be translated into some fairly straightforward improvements.
Keep briefings focused on the hazards and controls that actually matter that day. Avoid unexplained acronyms and unnecessary technical language. Where practical, show workers the location or equipment being discussed rather than describing it from the welfare cabin.
Plans, photographs and diagrams can be particularly useful for matters such as traffic routes, exclusion zones, lifting areas, emergency escape arrangements and changes to scaffold access.
Where translation is necessary, the critical safety message should still be verified. Translation software can be useful, and HSE recognises it as one possible option, but for complex or safety-critical instructions it is sensible professional practice to confirm that the translated information has retained the intended meaning.
The same principle applies to emergency arrangements. HSE specifically advises employers to ensure that workers fully understand emergency procedures rather than simply being told where they are written down.
What should you do now?
Construction managers and supervisors can make a useful improvement without creating another complicated procedure.
- Review whether site inductions use plain language and genuinely site-specific information.
- Identify workers who may need additional communication support before work starts.
- Avoid slang, unexplained abbreviations and unnecessarily technical language in briefings.
- Use photographs, drawings, demonstrations and marked-up plans where these communicate the risk better than text.
- Consider translated information where workers would otherwise struggle to understand safety-critical requirements.
- Deliver important briefings somewhere workers can actually hear them.
- Ask workers to explain or demonstrate key controls rather than simply asking whether they understand.
- Make it acceptable for someone to say that they did not understand the instruction.
- Check whether supervisors themselves have the communication skills needed to lead mixed-experience and multilingual teams.
- Review recurring unsafe behaviours to establish whether misunderstanding is contributing to them.
A toolbox talk signature should form part of the record, but it should not become the sole measure of whether communication has been effective.
Our professional view
The biggest risk is confusing evidence that a briefing happened with evidence that the briefing worked.
Construction businesses are understandably keen to retain induction records, signed RAMS and toolbox talk sheets. Those documents are important, but the real test is what happens when the worker leaves the briefing and encounters the job.
If someone can explain the hazard, demonstrate the control and knows what to do when circumstances change, the communication has achieved something meaningful.
Managers and supervisors play a major part in creating that environment. Broader management training such as IOSH Managing Safely and IOSH Working Safely can support better risk awareness and safety leadership, but it should complement rather than replace clear, task-specific information, instruction and supervision on site.