‘He’s funny, isn’t he?’ he grated, continuing his conversation with his internal audience. ‘He makes me laugh. He’s got that Dunkirk spirit. Eat as much shit as God wants to cram into your throat, but never say die.’

He took a step towards me. I threw a punch, but it didn’t connect. Asmodeus moved, faster than a snake, and batted my hand aside. ‘Count backwards,’ he said, ‘down to zero.’ Then his arm came back, and he smacked me open-handed across the face.

The force of the blow spun me round as a DJ spins a record. I hit the pavement again, tasting blood in my mouth, my head ringing. I looked up blearily as Asmodeus, in no particular hurry, walked across to join me. Behind him, headlights stabbed out of the darkness, turning the demon momentarily into a silver-edged silhouette.

I had to force myself to move. Knowing that it was either move or die helped, but the ringing in my ears distracted me and my fingers didn’t want to do what they were told. I reached for my whistle again and drew it out as the bright red double-decker bus loomed up behind the demon’s shoulder.

Asmodeus stared down at me, shaking his head in pitying wonder. ‘It’s like people say,’ he snickered. ‘If all you’ve got is a hammer, everything looks like a nail. And if all you’ve got is a whistle, the whole of life is one big fucking show tune.’

He leaned down, his hands reaching for my throat. ‘Opera,’ I corrected. ‘Götterdämmerung, you smug bastard.’ I plunged the whistle a couple of inches deep into his left eye, and as he bellowed in pain and rage I slammed my foot into his stomach with all the force I could muster.

The timing was almost perfect. Asmodeus took two steps back, but regained his balance almost immediately and didn’t actually fall. That didn’t matter though, because the two steps had taken him off the edge of the pavement. He went under the nearside wheel of the bus and vanished from my sight.

The bus went into a skidding stop, slewing round in the road. A body like a shapeless sack was dragged along with it, trapped in the wheel arch in some way and dispersing itself in red-black smears of pulped flesh across the rough dry asphalt.

I was up and running by this time. One glance back over my shoulder showed me that Asmodeus was moving again already, his arms weakly twitching as he tried to lever his ruined body up off the road surface. I knew from past experience that no amount of purely physical damage would keep a demon down for long. Flesh is like an item of clothing to the Hell-kin, and they’re used to making running repairs. It would take Asmodeus a few minutes to replace his lost body mass though, and I could use that time to get clear.