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Following the Germanwings plane crash which was deliberately caused by the co-pilot, airlines around the world have begun requiring two crew members to always be present in the cockpit.
BBC reports that a number of major Canadian, Norwegian, German and UK airlines have all pledged to change their policies.
Air Canada, Westjet, charter airline Air Transat, Norwegian Air Shuttle, Lufthansa, Air Berlin, Easyjet, Monarch Airlines, Virgin and Thomas Cook are just some of the airlines that have pledged to change their safety policies.
Monarch Airlines introduced the new procedure with immediate effect while budget airline, Easyjet has said it will resume the policy from today, Friday 27th March.
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The UK's Civil Aviation Authority (CAA) said it will "monitor the situation" as the crash investigation develops.
However, Germanwings parent company, Lufthansa said that no matter how good the security, ultimately nothing could stop a rogue pilot.
The new procedures will mean that two crew members must always be present on the flight deck.
The changes come after it emerged the co-pilot of Germanwings Flight 9525, Andreas Lubitz had apparently locked himself in the cockpit before crashing the plane into the French Alps.