Rolling live news coverage of business, economics and financial markets as disruption to UK air travel continues into third day
Rolfe has been asked about delays to investments in new systems.
He said Nats invests £100m a year, and the piece of the system that failed was replaced only five years ago.
If we receive an unusual piece of data, a piece of data that we don’t recognise, it is critically important that that information, which could be erroneous, is not passed to air traffic controllers.
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