It took only a few moments to snip a lock of hair and take an impression of his fingertips, and then Porter was alone again. Layla had left, locking the door behind her: they didn’t believe him yet, he noted, but they weren’t going to risk losing him either.

Porter flicked on the TV, but there were just replays of the PM’s statement on Katie Dartmouth. One of the political commentators was talking about the by-election coming up in nine days’ time, and how the government faced a potential humiliation if Katie was executed at the weekend. There were more calls from the Opposition for troops to be taken out of Iraq, and a vigil had already been started by the ‘Stop the War’ coalition in Trafalgar Square. Porter turned it off again. He’d watched enough by now to know how badly they wanted Katie out of there.

Alone with my own thoughts, he reflected. Always a dangerous place. An hour slipped by and then another. Porter could feel himself growing desperate for a drink. The coffee pot was empty, and the biscuits were all gone. As he stared at the walls, the doubts start to creep up on him, like maggots crawling across rotten meat. What the hell am I doing here? Who in the name of Christ do I think I am kidding?

I must be mad to want to get back into this, he decided, as he stood up to pace around the small room. Whatever it is a man needs to be made of to turn him into a warrior, I haven’t got it. And there is no point in thinking I’m suddenly going to acquire it at my age.

He looked at the door again. If only it wasn’t locked, he’d just walk straight out of here. Get back to his archway, use his spare cash to buy a couple of bottles of vodka, and get some rest. If they don’t come back soon, I’m going to start banging on the door. I can’t deal with this much longer. Not without something to drink.

Just then the door started to open. Layla walked in. ‘OK, so you are who you say you are,’ she said, sitting down behind the table.

She motioned to Porter to sit down opposite her, but he preferred to stand.

‘The problem is, John Porter is a fuck-up,’ she continued.

Layla glanced down at a sheaf of computer printouts she’d been carrying under her arm. ‘We’ve retrieved your records. And indeed, you were in the SAS from 1988 to 1992. But, how shall I put this delicately, you weren’t exactly gunning for any medals, were you?’

‘I was good enough to get in,’ growled Porter.

‘But not good enough to stay in,’ said Layla, her tone laced with sarcasm. ‘You fucked up in the Regiment. You were sent off to be a range warden but you couldn’t handle that either. After you left the army, you tried a few jobs, but you couldn’t hold them down. Your wife kicked you out more than ten years ago. She divorced you five years ago – but you probably didn’t even know because her lawyers didn’t have anywhere to send the papers.’