"If the porter's not there, the security will be on automatic," he whispered, peering through the glass doors. "I can see at least three video cameras and there may be more. They'll be operated by infrared movement detectors." He took off his rucksack and rummaged through the contents to find a small box of electronics. "We haven't got time to be too subtle. This will produce an interference pattern on any video camera within 50 metres." He switched on the little box and led the way through the doors. They crossed the floor of the lobby pretending to be deep in conversation, just in case there was a live audience after all. On the far side of the lobby he pointed out the cloakrooms and the direction of the lounge bar. "Let's go and get changed. I'll switch the interference off as soon as we're in the cloakrooms and I'll meet you in the lounge when you're ready. Don't rush: from here on it doesn't matter if there's anyone around to see us." When he had changed, he emptied the contents of his rucksack onto the floor. Turning the rucksack inside out converted it into a rather smart travelling bag and into it he carefully repacked all of his equipment. He opened the door and went out into the lobby again. There was a porter on the desk by this time but he paid no attention to the smartly dressed guest who made his way over to the bank of information screens.
