“Where am I going?” said Amy.

“Away from the warehouse door!” said Rahul.

“OK!” she said, sweeping the car left – AAARGGGHH!” went the other three again, as they swung across the seats that way. “But then what?” She hung on as they rounded a couple of corners, faster than she’d like, the whole car leaning to one side, then the other.

“Remember the brake!”

“Oh yes!”

She pressed on the brake button. The car slowed down instantly and stopped on the edge of the industrial estate. An actual road lay ahead.

“Where do I go out of here?” said Amy.

“Start the sat nav,” said Rahul. “It’s got your dad’s work address in Scotland already preloaded.”

Amy turned it on. The screen lit up. And said:

“Trowch i’r chwith!”

“Pardon?” said Amy.

“Trowch i’r chwith!”

“Is it speaking backwards?” said Janet.

“Sounds Welsh,” said Jack.

“Yeah …” said Rahul. “It is. It’s faulty. The voice command offers you a number of languages. But this one’s stuck on Welsh.”

“Brilliant,” said Amy.

“RAHUL! WHAT ARE YOU DOING!”

They looked round. Sanjay had come outside, with Rahul’s mother, Prisha, who were both in dressing gowns and just looking very confused.

“Trowch i’r chwith!” said the sat nav.

“What does it mean?” said Amy.

“I think it means give up now, this is never going to work,” said Jack.

“Do you speak Welsh?” said Rahul.

“Oh my,” said Jack, “this is going to be a long

“RAHUL! GET OUT OF THAT THING!” shouted Rahul’s mother.

“There’s a picture, on the sat nav screen,” said Janet, pointing. “With arrows.”

Amy did a double-take. “You mean a map. Of course there is! Thank you, Janet. Now, I’m the stupid one!”

“Pardon?” said Janet.

“Nothing,” said Amy. She peered at the screen. “Left! It means turn left!”

“Trowch i’r chwith!,” said Jack. “Obvious.”

Amy swung the steering wheel left, and the car moved into the road. It was dark. But then she clicked the light switch and the blackness in front of her lit up. She moved the direction lever gently forward.

“Oh my days,” she said. “We’re off!”

Jack was looking round. “Not for long. Rahul’s mum and dad are getting into their car. They’re going to chase us! And, I imagine, fairly soon catch us!”

Rahul shook his head. “No, they won’t.”

“Why not?”

“I know my mum and dad. Very law-abiding.”

Behind them, in their car, Rahul’s mum turned to his dad. “Come on, Sanjay! Why are you not starting the car! They are driving away! Rahul and his friends are driving that strange thing away! In the middle of the night!”

“Prisha, have you put your seat belt on?”

“Oh! No. Sorry … Where is it?”

“Good question.”

They both looked around for a while for their seat belts. And then, when they realised their seat belts weren’t there any more, they both looked out, to see the back of the Taylor TurboChaser driving away.