Left of the Bang. Claire Lowdon

usual garrulous, ebullient self, fond of hyperbole, susceptible to sentiment, domineering, opinionated, funny, warm. Tamsin could see nothing in his demeanour to suggest that here was a man with a terrible secret. And this was what made him truly monstrous.

      Bertrand wasn’t as relaxed as he appeared. He was worried – by Tamsin, about Tamsin. Before, the two of them had been a team. Now she was nervy and skittish, slow in conversation, unwilling to meet his eye. If he hugged her, she hugged back, but she no longer initiated contact between them. On more than one occasion, he had the impression that his touch was actually unpleasant to her.

      Before – but before what? Bertrand didn’t know; he couldn’t even really say when the change had occurred. He wondered if some male authority figure had behaved inappropriately towards her – a teacher, or perhaps one of the gap-year students who helped out at her summer music school. When he suggested this to his wife, however, she dismissed it as a typical piece of melodrama. ‘She’s growing up, that’s all. She can’t be your little girl for ever.’ They were in the bedroom, getting ready to go out for the evening. Roz spritzed perfume onto her left wrist, then drew her right wrist across her left in a sawing motion. ‘She’ll be thirteen soon. It’s just hormones,’ she said decisively, meeting her husband’s doubtful frown with a brisk, case-closed sort of look.

      Bertrand also wondered whether Tamsin knew about his affair. Somehow, it seemed to him that she might. No matter how firmly he told himself that his anxiety was unfounded, he felt increasingly uneasy in his daughter’s presence; and in time, he found he was unable to prevent unease from translating into mild aversion. He was ashamed of this feeling, and did everything he could to conceal it – to the point where he appeared, if anything, even more affectionate and indulgent towards Tamsin than before.

      As far as her mother was concerned, Tamsin was a textbook teenager: surly and non-responsive at home, perpetually in trouble at school. She collected detentions, missed curfews, got a tattoo. At fourteen she spent a night in A&E with a stomach full of vodka and caffeine tablets. At fifteen she pierced her own bellybutton. ‘Hormones’ became Roz’s buzzword, mouthed unsubtly over Tamsin’s head to sympathetic friends. Secretly, she was a little frightened of her eldest daughter. Tamsin at sixteen was a good six inches taller than her mother and almost ethereally thin, with angular shoulders and no hips or breasts to speak of. Cropped halterneck tops exposed the bejewelled bellybutton, elongated by the tautness of her stomach and embellished, more often than not, with a purplish crust of infection.

      On the rare occasions that her parents argued, Tamsin lay awake in bed, monitoring the muffled sounds coming up from the kitchen for any change in register that might signal the end. The end: expected and dreaded yet also, in a small, hard way, longed for. But the rapid cadences of blame and recrimination always rallentandoed into a truce, followed, a few minutes later, by her mother’s face at the bedroom door, flushed with guilt and tenderness.

      ‘Darling. All couples argue. There’s nothing to worry about, I promise. Your father and I love each other. And we love you. Love you love you love you.’

      Roz perched her small frame on the edge of the bed. Her daughter’s large-lidded eyes – Bertrand’s eyes – were round and wide, a precious glimpse of the little girl who had long since morphed into this difficult, untouchable half-woman.

      And so the silence continued, as if it might go on for ever. But later, when Tamsin looked back at that time, she would recall very clearly a sense of anticipation. A firework mutely blossoming, Concorde ripping noiselessly across the sky: those vacuum-packed, suspended seconds before the bang.

       Three

      Five fifteen on a Tuesday evening in late November: the crowded southbound Bakerloo line. Tamsin Jarvis, now seventeen, still very skinny, had a seat. Even better, she had the end seat. This meant she could lean right away from the woman on her left and press her hot cheek onto the pane of glass dividing the seats from the standing section. She had shrugged off her parka at Marylebone to reveal a faded black Nirvana T-shirt bearing the slogan ‘flower sniffin kitty pettin baby kissin corporate rock whore’. In her lap, a book of Beethoven piano sonatas, open at No. 21. Tamsin had been tracing the melody with a chewed-down fingernail, pleasantly conscious of the incongruity: a grungy-looking teenage girl absorbed in classical music, performing the indisputable miracle of turning black marks on the page into sounds in her head.

      She didn’t notice the suitcase until the train was pulling out of Piccadilly Circus. It was a pine-green, hard-shelled case with wheels and an extendable handle, pushed up against the other side of the glass panel. How long had it been there? At Charing Cross, she looked to see if somebody claimed it. People jostled past it on their way out, irritated by the obstacle. A small woman with a scrappy high ponytail banged her knee on it and let out a bleat of pain. The woman scowled around for the owner, but no one came forward.

      Almost as soon as the train had left the station, it stopped. Tamsin looked at the suitcase. Then through the window behind her at the tunnel blackness with its dirty arcana of wires and pipes. Then back at the suitcase. Someone was watching her: a tall boy about her own age, with broad shoulders and something slightly Asian, Chinese or Japanese maybe, about the eyes. He was standing in the middle of the carriage, holding the handrail with both hands, elbows flexed as if about to do a chin-up.

      The boy nodded towards the suitcase.

      ‘Is that yours?’

      Tamsin shook her head. ‘Is it yours?’ she asked, stupidly.

      ‘No.’ The boy leaned forward and tapped the shoulder of an older man in a pale grey trench coat. ‘Excuse me, sir: does that case belong to you?’ His voice was respectful and refined, the accent upper class without a hint of arrogance.

      The man frowned, shook a no, turned back to his paper.

      Tamsin and the boy each read the same thoughts in the other’s face. When the train jolted, they both jumped. But it was just a false start; another jerk and they were moving again. Tamsin looked away, suddenly sheepish. No one else seemed concerned about the case; surely they were both being paranoid.

      But her gaze was drawn back. Tamsin’s mind played forward to the blast, the train carriage crumpled like a Coke can. Though of course, she wouldn’t see that. She was sitting next to the suitcase; she would be killed outright. Tamsin Jarvis, daughter of the conductor Bertrand Jarvis, was killed outright in the attacks of 25 November. Unless the pane of glass was thick enough to protect her, just to begin with. Maybe it would shatter, or melt down onto her, sticking her clothes to her skin…

      At Embankment, the same thing again: one lot of passengers shuffling off, the next lot starting to push their way on prematurely. And all the time the suitcase squatting there, unclaimed. At the last minute, Tamsin stood up and burrowed to the exit. Two seconds later the tall boy followed her out. Neither of them said anything.

      In the bustle of the platform, Tamsin felt their fears start to shrink into silliness. The boy headed decisively for the help-point phone, only to find it was broken. As they discussed what to do, their convictions gave way to embarrassment. At last Tamsin said, quite firmly, that she thought they had both overreacted.

      The boy laughed nervously. ‘Right. Bloody hell. Don’t know about you, but I could really do with a drink.’

      ‘I was meant to be meeting friends in Camberwell…’ She looked up at him. There was a charming, improbable smattering of freckles across the bridge of his very straight nose. ‘But yes, a drink would be lovely, yes.’

      He held out his hand, smiling for the first time. ‘I’m Chris.’

      On the escalator, Tamsin felt the elation she associated with playing truant, but there was something else, too: an intimacy thrown over them first by fear and now, increasingly, foolishness. Yet at the entrance to the station, they both paused and breathed in deeply, tasting concrete in the damp November air. The world was newly sweet.

      Chris took her to Gordon’s