The novel, curved-roof double-deck trailer brainchild of Somerfield fleet engineering controller David Batty (Transport Engineer April) has inspired a big Birmingham-based parcel carrier to modify a fleet of 50 double-deckers along similar lines. The bluff front faces of Business Post's 4.88m-high (16ft) double-deck step-frame trailers are being made much more aerodynamically efficient by a retrofitted roof panel that slopes down towards the front. All that is lost is dead space above a single layer of 1,9-metre-tall roll cages on the trailer's neck section, behind which there is a 9.15m-long lifting deck. Business Post's general manager for transport, Kevin Webb, asked trailer manufacturer Don-Bur of Stoke-on-Trent, Staffordshire to taper trailer roof height down to four metres at the front bulkhead, in line with the top edge of the tractive unit's air deflector.
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机译：Somerfield车队工程负责人David Batty（运输工程师April）的新颖，弯曲的屋顶双层拖车的创意，启发了伯明翰的一家大型包裹运输公司，以类似的方式改造了由50辆双层汽车组成的车队。 Business Post的4.88m高（16英尺）双层阶梯式拖车的虚张声势的前表面通过加装的向下朝前倾斜的顶板使空气动力学效率更高。所丢失的全部是拖车颈部上一层1,9米高的防滚架上方的死区，后面是一个9.15m长的升降平台。 《商业邮报》运输总经理凯文·韦伯（Kevin Webb）要求斯塔福德郡特伦特河畔斯托克的拖车制造商Don-Bur将前舱壁的拖车车顶高度降低至4米，以使其与牵引装置导流板的顶部边缘对齐。
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