Which police officer should search a transsexual suspect?

A policeman and police woman come across someone they suspect is up to know good. They wish to give them a full body search for illegal substances, weapons, etc.

However, it's clear by looking at them that they've transitioned from male to female. They are insisting they're a woman because they've had the chop but uk law states your sex is your birth sex.

Which police officer should conduct the hands on body search?
Which police officer should search a transsexual suspect?
Which police officer should search a transsexual suspect?
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