The Fischers had obviously googled for the closest hotel to their daughter’s house, and had thus booked themselves into a brick-built combination prison block/ petrol station on Haverstock Hill whose lobby was shopworn, fussy and as welcoming as a job centre. I doubt the Fischers noticed, but I could see that Nightingale didn’t think it was good enough, and for a moment I thought he was going to offer to put them up at the Folly.

Then he sighed and told me to put the luggage down by the reception desk. ‘I’ll deal with things from here,’ he said and sent me home. I said goodbye to the Fischers and walked out of their lives as fast as I could go.

*

After that I really didn’t want to go out but Lesley persuaded me. ‘You can’t just come to a stop ’cause bad things happen,’ she said. ‘Besides, you owe me a night out.’

I didn’t argue, and after all, the good thing about the West End is that there’s always somewhere to see a film. We started at the Prince Charles but they were showing Twelve Monkeys downstairs and a Kurosawa double bill upstairs, so we went round the corner to the Leicester Square Voyage. The Voyage is a miniature village version of a multiplex with eight screens, of which at least two are larger than your average plasma-screen television. Normally I like a certain amount of gratuitous violence in my cinema, but I let Lesley persuade me that Sherbet Lemons, this month’s feel-good romcom with Allison Tyke and Dennis Carter was just the film to cheer us up. For all I know it might even have worked, had we had a chance to see it.

The foyer was dominated by the concessions counter which stretched across its breadth. There were eight transaction points, each with its own till nestled amid a confusion of popcorn dispensers, hotdog grills and cardboard display signs offering kids’ boxes tied to the latest blockbuster. Above each transaction point was a widescreen LCD which displayed the films on offer, their age classification, when they were on, how long we had until they started and how many seats were left in each auditorium. At regular intervals the screen would switch to display a trailer, an advert for mechanically recovered meat or just to tell you what a good time you were having at the Voyage chain of cinemas. That evening there was only one transaction point open, and a queue of approximately fifteen stood waiting to be served. We joined the queue behind a well-dressed middle-aged woman out with four girls aged between nine and eleven. It didn’t bother Lesley and me – if you learn one thing as a copper, it’s how to wait.

The follow-up investigation revealed that the single member of staff manning the transaction point that shift was a twenty-three-year-old Sri Lankan refugee named Sadun Ranatunga, one of four people staffing the Leicester Square Voyage that evening. At the time of the incident, two were cleaning out screens one and three in preparation for the next showing, one was on duty to take tickets and the last was dealing with a particularly unpleasant spillage in the gents.