‘Well, reasonably sure,’ I say, a delicate twinge of frustration whispering at my breastbone. ‘I mean, I saw her follow after you, because I shouted out to her to keep hold of your hand.’ There are hundreds, if not thousands of people here tonight, the display well known in the small patch of Surrey that we live in. It’s a regular annual event arranged by the PTA, and it’s well attended every year.

‘She didn’t,’ Fran whispers, her eyes meeting mine as the blood drains from her face. ‘She didn’t hold my hand. She didn’t catch up with me at all.’

I feel sick at Fran’s words, her fingers gripping my forearm, digging in vice-like. Trying to crush the rising unease that makes my stomach do a tiny somersault, I take a deep breath, peeling Fran’s fingers from my arm and taking her hand in mine.

‘Don’t panic,’ I say, trying to keep my voice level and calm, ‘she must have just wandered off. There are people on the gate; no one would let her walk out on her own, she’s only little.’

Fran nods, her face a sickly shade of white. ‘We need to look for her, I need to find her. Surely, she can’t have gone too far?’ She drops my hand and starts to shove her way past the crowds of people hemming us in. I follow after her, ignoring the tuts and frowns from others. Finally, I break free of the crush and catch up to her, as she begins to run across the field towards the bank of portaloos, slipping and sliding in the mud that coats her designer wellies.

‘Wait, Fran,’ I gasp, ‘wait. We need to . . . to think for a minute. We need to think about this logically, about where she might be.’

‘She was following me to the loos, that’s what you told me,’ Fran says, her eyes frantically scanning the field behind me, ‘I’m going to look there, maybe she did follow me, maybe she’s got locked in one of them, maybe she’s banging on the door now and no one can hear her.’ Another burst of fireworks erupts in the sky with a popping noise, as she pulls her arm away from me, staggering slightly.