In my old response team, on Nights we were all double crewed but Earlies and Lates always single crewed with exceptions for training/injury/wellbeing reasons.
There just aren't enough officers to send double crewed, every shift.
So, as horrific as this incident was, it would be difficult to justify the staffing sacrifice of effectively halving all number of units on Earlies and Lates, on the basis that it meant later on down the line, after the policy was nationally adopted, and widely known by all females, we will know that any sole male showing ID as an officer must not be trusted.
The theory is good, but it's just not practical with our current reduced numbers.
What about detectives sent out to take a statement? If the goal is that no male officers should be allowed out without a chaperone, it's impractical.
Many roles, such as undercover officers, surveillance, CID, specialist roles such as dog handlers, neighbourhood officers, PCSOs... Just simply wouldn't work as double crewed units.
I felt absolutely sick when I read that he apparently carded her and handcuffed her. What an absolute betrayal of trust.