SPD coding on an EICR

[QtecSolutions]

Hi All, just carried out an EICR on a rented property that has mains smoke detectors, there is no SPD fitted and as I understand any safety service should be protected by an SPD, what code would you give this.

 

[newfutile]

I code these as C3 as it was most likely wired before spd‘s were required , also i cant see it being a danger except in some fairly rare circumstances.