Matthew had said, later, that she had shown bad manners, and even worse not to explain what she was up to, in favour of maintaining that ludicrous air of mystery.

Robin gripped the handstrap tightly, and as the train slowed, and her heavy neighbour leaned into her, she felt both a little foolish, and resentful towards the two men, most particularly the detective, who was evidently uninterested in the unusual movements of Lula Landry’s ex-boyfriend.

By the time she had marched through the usual chaos and debris to Denmark Street, extracted the key from behind the cistern as instructed, and been snubbed yet again by a superior-sounding girl in Freddie Bestigui’s office, Robin was in a thoroughly bad temper.

Though he did not know it, Strike was, at that very moment, passing the scene of the most romantic moments of Robin’s life. The steps below the statue of Eros were swarming with Italian teenagers this morning, as Strike went by on the St James’s side, heading for Glasshouse Street.

The entrance to Barrack, the nightclub which had so pleased Deeby Macc that he had remained there for hours, fresh off the plane from Los Angeles, was only a short walk from Piccadilly Circus. The facade looked as if it was made out of industrial concrete, and the name was picked out in shining black letters, vertically placed. The club extended up over four floors. As Strike had expected, its doorway was surmounted by CCTV cameras, whose range, he thought, would cover most of the street. He walked around the building, noting the fire exits, and making for himself a rough sketch of the area.

After a second long internet session the previous evening, Strike felt that he had a thorough grasp of the subject of Deeby Macc’s publicly declared interest in Lula Landry. The rapper had mentioned the model in the lyrics of three tracks, on two separate albums; he had also spoken about her in interviews as his ideal woman and soulmate. It was difficult to gauge how seriously Macc intended to be taken when he made these comments; allowance had to be made, in all the print interviews Strike had read, firstly for the rapper’s sense of humour, which was both dry and sly, and secondly for the awe tinged with fear every interviewer seemed to feel when confronted with him.

An ex-gang member who had been imprisoned for gun and drug offences in his native Los Angeles, Macc was now a multimillionaire, with a number of lucrative businesses aside from his recording career. There was no doubt that the press had become ‘excited’, to use Robin’s word, when news had leaked out that Macc’s record company had rented him the apartment below Lula’s. There had been much rabid speculation as to what might happen when Deeby Macc found himself a floor away from his supposed dream woman, and how this incendiary new element might affect the volatile relationship between Landry and Duffield. These non-stories had all been peppered with undoubtedly spurious comments from friends of both – ‘He’s already called her and asked her to dinner’, ‘She’s preparing a small party for him in her flat when he hits London’. Such speculation had almost eclipsed the flurry of outraged comment from sundry columnists that the twice-convicted Macc, whose music (they said) glorified his criminal past, was entering the country at all.