Mansfield nodded, then opened the laptop and read through the emails. ‘I see.’ When she looked up again, she cleared her throat decisively. ‘OK, Clara, I’m going to hang on to this for now, and talk it over with my sergeant in CID. What I suggest you do now is go home and wait for us to get in touch, and in the meantime, if you hear from Luke, or if anything else suspicious happens, please call us straight away.’ She got up and with another brief smile and a nod of her head, indicated for Clara and Mac to follow her.

But Clara remained seated, staring up at her in alarm. ‘CID? So you agree those emails could be linked to his disappearance?’ She had half hoped to be fobbed off, to be told she was overreacting, that there was clearly an innocent explanation for it all. The seriousness with which Mansfield was taking her concerns caused darts of panic to shoot through her.

‘It’s possible,’ the DC said. ‘There could be any number of reasons why he’s taken off for a bit. He might have gone out and had a few drinks and not made his way home yet – that happens. Hopefully there’s nothing to worry about. But as I said, go home, and someone will be round to see you as soon as possible. We have your address.’ She went to the door and held it open, and reluctantly Clara got to her feet.

‘Are you all right?’ Mac asked as they trudged back down Kingsland Road towards home.

‘I don’t know. It all feels so strange. You see on the news and stuff about people disappearing, you see those Facebook appeals, and I can’t believe he’s one of them, it’s too surreal. Half the time I’m telling myself there’s some rational explanation and I should just chill out, the other half I feel guilty because I’m not tearing through the streets searching for him. I don’t know what to do.’