I am wondering whether to take a punt with this. The vehicle crossed these offset cross roads from Durnsford Road (B106) crossing the A109 onto Brownlow Road (B106). But the Brownlow Road section prohibits HGVs of max gross weight 7.5t and over. There is only one sign that I can find at the start of Brownlow Road and there is no advance signage on Durnsford Road (B106).
Now, I know there is no advance signage specifically mandated in statute.
However, LATOR 1996 regulation 18 requires authorities to place signage in positions to provide adequate information as to the effect of the order for persons using the road. There is no advance signage, and from the traffic lights on Durnsford Road, the one weight restriction sign on Brownlow Road is not visble from the left lane (as shown in screenshots on Google Drive link) which is the lane that goes down that road.
For a 44t articulated HGV it is necessary to be warned before the traffic lights so the driver can change lanes to be in the correct lane to avoid the restriction at the traffic light. Once in the crossroads and vehicles are turning, it becomes unsafe to start changing lanes for an artic. And if the sign is only seen once on entering Brownlow Road, then it is too late at that point to avoid it.
The location:
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While the TSM is guidance, if signage fails to adhere to it, it can be deemed inadequate and to have failed the statutory duty under regulation 18. It is a subjective test.
PCN and GSV screenshots: