It will "cover it" from the POV of getting you your "Landlord's Certificate".
It will not "cover it" from the POV of certifying the work of installing the CU, and it will not "cover it" from the POV of certifying that it complied with the Building Regulations and it will not "cover it" from the POV of it being notifiable work.
It will not "cover it" from the POV of certifying the work of installing the CU, and it will not "cover it" from the POV of certifying that it complied with the Building Regulations and it will not "cover it" from the POV of it being notifiable work.