I think I can see a way in. I think I might be able to talk him round. If only to save my own life.

‘None of it was your fault, Tom. Erin’s death wasn’t your fault. Jess leaving you was her choice. You weren’t compatible. She didn’t know you. Not like I know you.’

‘You’re the only one who has,’ he says, his voice hoarse. ‘You’re the only one who knows the truth now.’

‘I know. And that means so much to me, Tom.’

‘You must think I’m crazy,’ Tom says, running his finger along the blade of the knife, the metal glinting occasionally as it catches the light of the moon.

‘No, not at all,’ I say. ‘Don’t forget I know you. I understand you.’

‘Where did you get the photo from?’ he asks, his voice calm and quiet.

‘Jess gave it to me. I don’t know where she got it.’

Tom nods slowly.

‘Tom, will you tell me everything? About Jess. Erin. The necklace. The email.’

‘Why? What’s the point?’

‘Because we’re being open and honest now. You can tell me everything, and I can tell you everything.’

‘You don’t need to tell me anything,’ Tom says.

‘I know. But I want to.’

‘No, I mean you don’t need to. I already know. You drove down to Bodmin to find Jess, but you stopped at Bideford for a bit first. And Chieveley Services on the way.’

I don’t know how he knows this, but I see absolutely no point in denying it. That’ll only rile him.

‘Yeah. Yeah I did. I mis-remembered the email and thought she’d said Bideford. It was gone when I woke up. How did you manage to get in and delete it?’

‘I work in online security, Grace,’ he replies, a deadpan on his face. ‘It’s our job to stop people getting in. To stop someone doing something, the first thing you need to know is how they’re going to do it.’

‘You put a tracker on my car, didn’t you?’

‘Easily done. Ten minutes on eBay, that one.’

‘Did you think I hadn’t seen the email?’

‘Honestly?’ he says, looking at me. I nod. ‘Yeah. Yeah, I thought I’d got there before you. You were absolutely steaming and I assumed you’d just crash out. It was showing as unread when I saw it. I called you when I landed and you seemed fine. A bit hungover and pissed off, but you definitely didn’t sound like you’d read that email.’

My acting skills haven’t faded too much over the years, then.

‘When did you realise I’d seen it?’ I ask.

‘I checked the tracker after we spoke on the phone. That’s when I saw you’d gone to Cornwall.’

‘And what did you do?’

Tom stays silent for a few moments, and I don’t push him for an answer.

‘I explained I had a family emergency back home and booked onto the next available flight.’

My breath catches as I hear Tom say this. I know where it’s leading. ‘You were in the UK?’