When she got to Watford Gap services, she realized she felt tired and hungry, and she still had a long way to go, so she decided to stop for a short break. She didn’t even notice the Mondeo pull in two cars behind her. A few seedy-looking people hung around the entrance; a couple of kids who didn’t look old enough to drive stood smoking and playing the machines, giving her the eye as she walked past, staring at her breasts.

She went first to the ladies’, then to the café, where she bought a ham-and-tomato sandwich and sat alone to eat, washing it down with a Diet Coke. At the table opposite, a man with a long face and dandruff on the collar of his dark suit jacket gave her the eye over the top of his glasses, pretending to read his newspaper and eat a sausage roll.

Was he just a garden-variety pervert, or was there something more sinister in his interest? she wondered. In the end, she decided he was just a perv. Sometimes it seemed as if the world was full of them, that she could hardly walk down the street or go for a drink on her own without some sad pillock who thought he was God’s gift eyeing her up, like the kids hanging around the entrance, or coming over and laying a line of chat on her. Still, she told herself, what else could you expect at this time of the night in a motorway service station? A couple of other men came in and went to the counter for coffee-to-go, but they didn’t give her a second glance.

She finished half the sandwich, dumped the rest and got her travel mug filled with coffee. When she walked back to her car she made sure that there were people around – a family with two young kids up way past their bedtime, noisy and hyperactive – and that no one was following her.