The government has confirmed that it has scrapped a computer network seen by some experts as key to helping the UK combat terror threats.
A spokeswoman for the Cabinet Office said that the government was not continuing its pilot of the internet-based Hazmod emergency planning system.
The Hazmod extranet pilot scheme examined the distribution of maps over the internet for emergency planning purposes.
The Cabinet Office has denied that Hazmod was a key anti-terror weapon in the government's armoury.
The spokeswoman said, "Since the pilot, technology has moved on a great deal - there are now much better and faster systems available from organisations such as the Met Office and the Defence, Science and Technology Laboratories (DTSL) who use world class, leading-edge technology on a daily basis."
Officials promised that in the event of an accident or attack, emergency planners would have access to information from the Radioactive Incident Monitoring Network (Rimnet), the Met Office, DTSL and the Police's Gold Command arrangements for dealing with incidents.
"Even the local emergency planning community recognised Hazmod's shortcomings - that's why the pilot was not taken forward," the spokeswoman said. "There is no gap in our cover."