ROYAL protection cops warned Meghan Markle to stop closing car doors as she gets out — amid extremist attack threats.
Vehicles used by Meghan and Harry on official duties have self-locking doors.
And officials feared she would not be able to get back inside to safety quickly.
Security chiefs intervened after the former actress, 37, and Prince Harry, 34, were targeted by far-right threats.
A source said: “Nothing is more important to these guys than protecting the Royal Family.
“Meghan and Harry like to meet the public as much as possible and make contact with the crowds that come to see them.
“And although having a car door closed might seem like a trivial thing, it could be the difference.
“God forbid if anything did go wrong arriving at a royal engagement, but security need to be able to get them back into cars in seconds if needs be. If they’re closed and locked, it’s impossible.”
The revelation follows Prince Philip’s car controversy after the 97-year-old narrowly escaped serious injury when the Land Rover he was driving overturned in a crash.
The Sun then revealed claims that seatbelt alarms on royal Land Rovers were disabled at the family’s request to silence warning beeps.
The Meghan security intervention explains why the duchess has been shown leaving the car door open at recent events.
Previously, she had been praised for her down-to-earth attitude in shutting the car personally and not leaving it to anyone else.
On her visit to London’s Royal Academy of Arts in September, she can be seen closing it herself.
But the door remained open as she was pictured in Auckland, New Zealand, in October.
News of the strict security enforcement comes weeks after Meghan’s bodyguard quit her role.
And it is less than a month since a neo-Nazi group branded Harry a “race traitor” over the marriage.
Last February, Scotland Yard had to be called in after a letter claiming to contain deadly anthrax was sent to Meghan at Kensington Palace.
The message was said to contain a racist remark. Analysis later found the substance was harmless.
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