London businesses fearing related attacks on the City and Docklands took immediate steps to invoke their disaster recovery service agreements.
"One of our clients - a large one, I believe Docklands-based - has invoked our workplace recovery services," said Stephen Bean, group marketing director of business continuity specialist, Guardian iT. He said the company was in the process of moving key members of staff to a remote location "as a net result of what has happened in New York. We will be surprised if others do not invoke our services," he said.
The action follows apparent terrorist attacks on New York's World Trade Centre and the Pentagon.
Meanwhile, London Internet Exchange reported a 10% fall in Internet traffic in the capital on Tuesday afternoon. The exchange said that the evacuation of the Stock Exchange, Lloyds of London, Canary Wharf, and other buildings had contributed to a sharp fall in traffic.
There were signs too that the public had given up trying to access congested news Web sites and were relying on TV and radio reports for updates, it said. Reports in the US suggested Internet traffic there had risen by 80% as the disaster unfolded.