I didn't know whether or not the police had already visited her dad's place, or whether they'd located the car, but it had to be worth telling them about.

Hoping that he had some good news for me, I dialled Mike Bolt's number.

Eamon Donald stubbed his cigarette underfoot and watched as the lorry drove through the open double doors and into the cavernous barn, stopping at the end. The driver exited the cab and Donald immediately recognized him as Frank O'Toole, a volunteer from the old days. They'd spent a few months together in the Maze in the early nineties, before the first ceasefire, and Donald remembered that he'd been well thought of by his commanding officer. 'Reliable' was the word he'd used. Exactly what was needed for a job like this.

He was less sure of the other guy Hook had hired, a big shaven-headed thug from south London called Stone, who was currently at the far end of the barn sawing up long tubes of drainpiping into pieces six feet long. Stone didn't speak much, nor did he ask any questions, such as 'What am I doing sawing up tubes of drain-piping?' He did exactly what he was told without fuss or comment. In Eamon Donald's view, men who didn't ask questions shouldn't be trusted. Either they were immensely stupid or, worse, they were pretending to be. Hook had said that he'd worked with Stone in his days as a freelance London hitman, and it had been a success. Donald trusted his current employer's judgement, but he still had his doubts about the Londoner.

'Hello Eamon,' said O'Toole, coming over. 'I had an idea I might run into you at some point on this op. How are you doing?'

'I'm fine,' answered Donald, smiling thinly as they shook hands. He hoped that other people wouldn't jump to the same conclusion. As one of the IRA's most seasoned bombmakers, with more than twenty-five years' worth of experience with explosives under his belt, some of which was still very much up to date, Donald had to be very careful that he covered his tracks on this op. 'So, you know what the load is you're carrying, then?' he asked.

O'Toole nodded. 'Aye, I do. I don't think he does, though.' He pointed at Stone, who had his back to them, sawing away.

'No, and we're not going to say anything to him either. The fewer people who know about this, the better. And he might not be too happy if he thinks we're going to bomb his home town.'

'Are we?' asked O'Toole, looking interested. 'Do you know what the target is?'

'No, I don't.' This was a lie. Donald knew exactly what, and who, the target was going to be. 'All I know is it's got to be ready by ten o'clock tonight, so we're going to need to get going. I don't want Hook on my back telling me to hurry things along. You can't hurry something like this.'

'Where is Hook?' asked O'Toole, looking round.

'He's about here somewhere. Probably with the hostages.'

'They're still alive, are they? I thought he'd have wanted rid of them by now.'

Donald shrugged. Hook had always had an eye for the ladies. In the old days he'd had a lot of success, but that had all changed when his face had been ripped apart by the bomb. Now he just looked like a freak. But Donald had no doubt that he would have taken advantage of the current situation, and that both the women upstairs would have been on the receiving end of his unwanted advances by now. As a father of two adult daughters himself, Donald didn't approve. He was notoriously prudish in matters of the flesh, but as long as it didn't interfere with the op, and they were both disposed of before the end of it, he was prepared to turn a blind eye.

Deciding it was time to bring the small talk to an end, he walked over to the back of the lorry. 'Keys,' he said to O'Toole, putting out a hand.

O'Toole handed them to him, and Donald unlocked the rear doors and pulled them open.

In front of him, stacked two high, were open-ended wooden pallets containing neat, straight rows of plain aluminium cylinders – 236 in all. But Eamon Donald didn't see plain aluminium cylinders. He saw great gouting plumes of fire and jagged clouds of shrapnel. Destruction. And, of course, revenge. The IRA's struggle might have officially ended more than a decade earlier but Donald retained a deep hatred for the British. They'd imprisoned him in the Maze for a total of fourteen years, as well as shooting dead his brother, Padraig. He'd made them suffer too, of course, with a string of bombs that had left more than fifty members of the Brit establishment and their allies dead down the years. The innocent had died too, several dozen at least, but they were unavoidable collateral damage in a war that, for Donald, would never be over.

When Hook had approached him a few weeks earlier with his offer of work, Donald had almost said no. The job was risky in the extreme and likely to attract a lot of heat. But he'd gone for it, and it had had nothing to do with the hundred and fifty grand he'd be receiving. It was because Hook was providing him with the opportunity for a bloody, crippling victory over his old enemy that would eclipse everything that had gone before.

O'Toole must have read his thoughts. 'It's going to be a big one, isn't it?' he said quietly.

Donald caught the vaguest flash of doubt on the other man's face as he turned his way and fixed him with a hard stare. 'Whatever it is, it's no less than the bastards deserve. Remember that.'

Bolt was woken by his mobile phone. He sat up suddenly, groggily patting his pockets, before finally locating it. He didn't recognize the number and for a split second he wondered if it was Tina.

But it wasn't. It was Rob Fallon, and he was asking if they'd made any progress on the hunt for her and Jenny.

Bolt had snatched some sleep in his office while all around him his colleagues had been working flat out, but so far Operation Medusa, the massive police operation to find the missing consignment of mustard gas and, by extension, the two women, hadn't been successful on either count. They knew that the lorry was in the UK, and that it had come in on the overnight ferry from Zeebrugge to Harwich, but they were also sure that its number plates had been changed en route because an emergency trawl of all the traffic cameras in the greater Harwich area had failed to turn up anything. Like Hook, it had disappeared into thin air. A complete news blackout was in place while the full resources of the British state were diverted to the hunt, but he was all too aware that even this might not be enough, because time was not on their side.

Bolt cleared his throat, fighting down his disappointment, and gave Fallon the stock answer that they were following up a number of leads and that he'd give him news as soon as he had any. He felt like crap, and hoped Fallon would get the message and get off the phone.

'I might have a lead for you.'

Bolt perked up a little, but not much. Things had moved on, and Fallon was the least of their problems in a case as big as this. But he asked what it was, then listened with growing interest as Fallon explained about the car on Roy Brakspear's drive the previous day and the photo he'd taken on his mobile. 'I don't know how much help it is,' he continued uncertainly, 'but I thought you ought to know about it.'

Bolt pulled a notebook from his jacket and wrote down the car's make, colour and registration number, then he hung up, feeling a little more hopeful suddenly. Fallon had told him that the car wasn't there when he'd returned to the property, so it had clearly been used by the kidnapper. If they could find the car, it was possible they could find Hook.

He put the mobile back in his pocket and got to his feet, still feeling pretty crap, but Fallon's information had given him enough of an adrenalin buzz to keep him going for a few hours longer.