A couple of hours later, after they had just got through roadworks outside Birmingham, Bonnie let out a sudden cry, thumping the wheel as she did so and beeping the horn by accident. She lifted a hand as the driver of the car in front gave her a middle finger. ‘Look at that butt hole,’ Debbie said. ‘We should run him off the road. What’s the matter?’ ‘I forgot to call in sick.’ Debbie grinned. ‘We’ve got this. Next service area.’ ‘They pulled in at a small services and Bonnie took out her phone. Her hands were shaking; she was half an hour late already. She typed in the supermarket’s number while beside her Debbie sniggered at her ancient phone. Scowling, Bonnie lifted it to her ear. ‘I supposed it doesn’t have a speaker, so I can’t listen in,’ Debbie said. ‘Just be quiet a minute.’

