NGK’s promotion girl, Gemma LIoyd became trapped for four hours when she climbed into the back of the van to get a pen, and the wind closed the door behind her.
It was only when her cries were heard by a group of cyclists on a charity ride from John O’Groats to Land’s End in aid of Sport Relief that her four-hour ordeal came to an end.
She had been returning from visiting independent garages in Devon when the incident happened.
The 27-year-old, who had left her mobile phone out of reach in the front of the van, said she was “really overwhelmed” when the cyclists opened the door.
A spokesman for NGK Spark Plugs, said: “We are relieved that Gemma was released safe and well from our BoxClever van and would like to thank the cyclists who helped extricate her by making a £500 donation to Sport Relief.”
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