A British police officer who has served on the force for 13 years will now be able to express their gender identity in the workplace.

The Met Police sent out an internal message entitled “Bring Your Whole Self to Work,” where the Police Constable - known only as Callum or Abi - revealed their gender fluidity.

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“The first time I walked into a Met building as Abi, I was hyperventilating so much I almost passed out,” the officer told the Sun. “I’ve done it a handful of times since, and felt so happy that I got to be me at work."

“Abi is a part of me that exists and I want that part to be recognised and validated," the explained, adding: “But I’m still me. I’m still the same person whether I’m presenting as Callum or Abi. It’s the same dice. You’re just looking at a different number," they said.

The Police Constable has been given two warrant cards—and can use either depending on which gender they identify with at any point.