Target

Mo wasn't mollified. 'What about the checks and balances?' he asked. 'You should have known about it. You're a director of the company, for God's sake.'

'Roy's a director, too. He's in charge of the bloody checks and balances. How was I to know he'd do something like this? I can't understand it. What the hell did he think he was doing?' Cavendish put his head in his hands and stared down at the desktop.

Bolt put a hand on his shoulder. 'OK, Mr Cavendish, no one's saying it's your fault. But we really do need to locate the lorry carrying this load.'

Cavendish slowly lifted his head and looked up at Bolt with frightened eyes. 'That's the problem, Mr Bolt. We don't have any of our own drivers. We use agency ones, and they come from all over the place. That bloody gas could be anywhere.'

Forty-six

Mike Bolt was an optimist. He'd had some hard, hard times – the death of Mikaela being the hardest of all – but he remained conscious of the fact that if he kept a level head and rode the punches thrown at him, eventually he'd come through the other side, and things would get better. Because if you let them, they always did.

But at that moment he was having to work hard to keep his spirits up. Finding the mustard gas and, by extension, Tina and Jenny Brakspear was looking like an impossible task. In Hook, they were up against a highly professional operator who'd only remained at liberty for so long because he kept ahead of the game. But it was still possible, he told himself. It was just a matter of staying calm and working through the leads they had, and for that they needed resources.

It was twenty to four when Bolt stepped outside into Cavendish's back garden, leaving Mo inside with him. He dialled Big Barry's home number. The case had changed dramatically now that national security was threatened, and Bolt needed his boss's help.

Big Barry still sounded asleep when he answered the phone, but that didn't last long. 'How could this happen?' he demanded when Bolt told him about the mustard gas.

'All too easily, by the sound of things. Obviously, the important thing is to find the bloody stuff. Cavendish is in a bit of a state of shock.'

'I'm not bloody surprised. He'll be in even more of a one if it gets let off and it's his firm that's responsible for it. How bad could it be if it's released?'

Bolt told him.

'Christ.' There was silence on the other end of the line as Big Barry took the information in. 'I'm going to have to get the director involved. The PM's going to have to know about this as well. This is government-level stuff.'

'I know,' said Bolt, moving further into the garden. 'Cavendish has given us a list of agencies in the UK and Europe that Mainline have used before to hire drivers. But there are a lot of them. Eighteen altogether. And as Brakspear was trying to hide what he was doing, it's possible he could have gone to someone else.'

'How do we know that he even hired a driver? What's to stop him sending one of the kidnappers over to pick up the order?'

'I asked Cavendish about that. All drivers carrying hazardous goods have to have something called an APR licence, which has photo ID on it. They give them out to plenty of people, but it's unlikely the company manufacturing the mustard gas in Germany would have given the order to someone who didn't have a valid one. One could always be faked, I suppose, but my guess is Hook's going to try to intercept the load somewhere between the factory and the final destination, which is a secure facility that Mainline have just outside Cambridge.'

'If he hasn't done it already.' Big Barry sighed. 'OK, email me that list and the name of the company in Germany. I'll get resources lined up to contact everyone, but it's all going to take a while at this time of the morning.'

'There might be a quicker way,' said Bolt.

'What?'

'I'm pretty sure Brakspear was being imprisoned in his home shortly after Jenny was kidnapped. He was there on Monday because Tina and Cavendish both told me they called him at different times, and he was there when Fallon turned up yesterday morning. So it's possible he called the agency to hire the driver from his home phone. If we check the records, we might be able to find out who it is.'

'Good thinking,' said Big Barry, suddenly sounding a little happier. 'Good work, old mate. I tell you: if we stop this stuff falling into the wrong hands, it'll be a real result for SOCA. A high-profile one, too.'

Bolt knew that his boss was always on the lookout for the big result that would get him on to the next rung of the SOCA ladder, and nearer to his final goal of directorship. Ordinarily, Bolt would have let it go. He was used to Barry's attitude, and because he was a decent enough boss he could generally tolerate it, but these weren't ordinary times. 'I'll be happy when we get Tina and Jenny Brakspear back,' he countered, making little attempt to disguise the irritation in his voice.

'Of course, of course,' said Big Barry, backtracking. 'And what about Roy Brakspear? You said he was at home yesterday morning. Is it possible he's still there?'

'I doubt it, sir. My gut feeling is that Hook would have moved him after Fallon turned up, just in case Fallon raised the alarm. And if not then, they'd have moved him by now because Hook must know we've spoken to Fallon.'

'Hook's got a lot on his plate at the moment and he can't be operating with that many people. He might not have had the chance. Can you get down to Brakspear's place and take a look around? You're up that way, aren't you? In the meantime, I'll get a full surveillance team with armed back-up, and a search warrant sorted out. We might have to break him out of there.'

'I don't want to do anything that endangers Tina, sir. Or Jenny.'

'We'll do what we can to bring them home in one piece, but I'm sorry to have to say it, old mate, but as of now they've ceased to be top priority.'

Forty-seven

Bolt and Mo were exhausted, operating purely on adrenalin as they drove to Brakspear's place.

'I want to tell Saira to take the kids out of London for a couple of days,' said Mo after a long silence. 'Her sister's in Leicester. They can go and stay there. There's enough room.'

'Don't do anything yet,' Bolt told him. 'We don't even know the current whereabouts of the gas, and it's important we keep things under wraps as much as possible. We don't want to start some kind of panic.'

'That's easy for you to say,' Mo snapped. 'You don't have a family.' He stopped himself from going on, a look of anguish crossing his face. 'I'm sorry, boss, I didn't mean it like that. It's just, you know…' He shook his head. 'All this is a lot to take on board.'

'It's all right,' said Bolt. He knew he'd almost certainly have done the same if Mikaela was still alive: made a call, told her to keep quiet but to get out of the city. Now that he lived alone it was hypocritical for him to deny others the chance to put the safety of the people they loved first. 'Do what you think's right, Mo,' he said eventually. 'I won't stand in your way.'

Mo nodded, and fell silent again.

It had just turned quarter to five when they reached Roy Brakspear's house. Bolt slowed down a touch as they passed the front entrance. The wrought-iron gates were shut but he caught a glimpse of Brakspear's car on the driveway.

They parked next to a terrace of whitewashed cottages nearby and got out of the car. The first signs of light were appearing on the horizon and the early morning was peaceful and silent. Big Barry had called back to tell Bolt that a surveillance team wouldn't be available for at least an hour, but he'd also said that if he thought the place was empty then they should go inside and worry about the consequences later. Which suited Bolt just fine.

A footpath at the end of the terrace ran parallel to the exterior wall of Brakspear's property to a cornfield beyond, and they moved up it in silence. The side gate was locked, but as long-term surveillance officers they were used to getting into places they weren't supposed to, and they helped each other over the wall and into the garden.