Moving towards the estate, I weave instinctively through a warren of concrete alleys, the streets I have walked so many times that I no longer see the dog-ends or the piss stains on the walls.

I have no idea how long it takes, moving on autopilot down Prince of Wales Road towards South End Green, where the air has a certain clarity. Flinching, I step back as an ambulance swings past the curry house; the steel shutters clamped to the floor, the body of a man slumped in front of it.

My feet keep moving and soon I pass the old cinema which has been transformed into a chain food hall, towards Hampstead Heath overground, past the Magdala pub, and up past the terrace of big stucco-fronted houses. A woman leans out of the front door of the most beautiful building on this stretch, with tiled steps and wisteria hanging precariously over the top. She is stooped over as if shielding herself from the outside world, collecting the morning papers from the step, her pale blonde hair falling in front of her face. When she looks up and sees me, there is a flash of fear and for a moment I see myself through her eyes.

The image haunts me as I move, more quickly now, drawn onto the Heathland I know so well. Instinctively, I drift away from the path. It must be sometime around 6.15 a.m. and yet I cannot face the prospect of bed, knowing there will be hours of tossing from one side to another before sleep finally comes. For now, the Heath is calm and familiar: safe until the hordes descend with their flat whites and Bugaboos.

Steering across the hill towards the pond, I reach down and slip off my trainers, enjoying the sensation of the dewy grass against my toes; above me, the sky lingers somewhere between night and day. When I reach the bench overlooking Kite Hill, I sit, pulling my knees up under my chin, aware of the smell of mould and earth seeping up through the slats of wood. As a wave of cognisance strikes, I push it away, trying not to think about the press conference with the local council I am due to cover on Monday. It’s the kind of painfully provincial story that makes me remember that I was approached by one of the nationals, just before everything fell apart. Would I even have taken it? Either way, there is no point thinking about that now.

My mouth is dry, my eyelids heavy and at the same time bolted open as if held in place with a match. Fumbling in my bag, I pull out a tiny block of hash and a lighter, enjoying the burning sensation at the tip of my thumb as I crumble it into a Rizla. The first drag burns the back of my throat.