India, July 30 -- A technical issue at the NATS Swanwick air traffic control centre led to flights being restricted from flying over London, and also affected operations are multiple airports in the United Kingdom, including Birminghum and Edinburgh on Wednesday.

While the National Air Traffic Services in UK stated that the system has now been restored, delays are still being reported from across the country, BBC reported.

In an earlier statement from the ATC said that the controller was limiting the number of aircraft flying over London "in order to ensure safety".

The issue was detected at the NATS Swanwick ATC, and has impacted all outbound UK flights. Gatwick, Manchester, Edinburgh and Birmingham are among airports where flights ar...