What are the requirements for servicing, testing, and maintenance in areas of my premises which are currently out of use?
It is the responsibility of the responsible person and/or the duty holder to ensure they are testing and maintaining all fire safety measures to maintain safe premises.
If there is no one on, or in the immediate vicinity, of the premises who may be reliant on your fire safety measures (e.g. in accommodation above a premises), the The Regulatory Reform (Fire Safety) Order 2005 (as amended by the Fire Safety Act 2021) (FSO) allows a risk-based approach to testing and maintenance.
If doubt exists advice must be sought from a competent person.