Engineering company, carry small ammounts of COSHH to and from site. WD40, Galv spray etc.

They also may do some brazing on sites too.

Do they need to carry a 2kg extinguisher ? or can they remove them all?  Eitherway can you show where it says they are not needed. Such as HSE guidence / ADR section etc.

They currently have some in, but they havent been serviced so before i spend the money im looking at reasons why they need them. Afterall, my risk assessment pretty much says exit vehicle and awaiting emergency services etc.

Thank you in advance.

The rules for Fire Extinguishers are written in to the carriage of Dangerous Goods regulations.

https://www.hse.gov.uk/cdg/manual/crew.htm#fireext

"COSHH" as you are calling it is NOT Dangerous Goods transport.

It is likley the WD40 as an aerosol or plastic container (rather than a pallet or more) is Limited Quantity exemption as would be most of the other products being transported.

The cab requirement is to aid evacuation by the driver rather than any concept a 2Kg powder extinguisher will make any dent in an actual load or vehicle fire, even more so with batteries in EV, Hybrid and PHEV.

In non ADR scenarios it does come down to Risk Assessment.

You have already stated a get out / stay out policy - does that also include NOT opening the bonnet to allow air access to the fire?

As you have not described the vehicle and with regards to other controls:

1) Is the cab and load area separated by a suitable bulkhead or can fumes etc pass between?

2) Is the load area specifically ventilated to disperse any fume (and heat) build up?

3) Is there suitable racking or casing to carry the materials to protect them from being damaged or punctured in transit?

4) Is there a strap to hold the brazing bottle to stop it rolling around?

5) Does your instruction require the driver to disconnect regulators and hoses before transporting gas bottles?

In the event any answer above is a no then I would suggest the driver would benefit from an escape aid.

Then you have the "at site" consideration that if your employees are conducting hot works are you reliant on others providing the extinguisher for a fire watcher?

It is realtivley cheap to add such extinguishers to an existing extinguisher maintenace contract.