There's two stories that have been posted. One of the Halfords lorry, which is a double deck trailer and the cab roof is undamaged. There's a second one from Norfolk where the cargo was a container on a flat bed, where the airdam has been damaged when the lorry has tipped (thus just one corner dinged). You're both right about two different lorries!
Oh right, I wasn't aware of another one in Norfolk

! Container lorries tend to do a lot more damage, on most other lorries the bodywork absorbes much of the impact.
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There does seem to be an increase in these double deck trailers - they are fine on the Motorway but in town with low trees and bridges they seem to be a liability
Also it's scary passing one in a strong crosswind!
I think they are a fairly recent innovation, Asda use them as do many parcel related businesses. As you say they're fine on the motorway but a bit of extra care is needed elsewhere.
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Halfords trucks are operated by DHL so it is DHL's driver or sub-contractor at fault. The Renault unit is not one of their normal ones so it may have been either hired in or driven by a sub-contractor.
Of course Halfords could have saved all this embarrasment by using plain unliveried trailers..............as for the 'we fit' bit

!
DHL are involved in a lot of distribution work, it's difficult to make any excuse for the driver but obviously we all make mistakes
