Application to premises
6.—(1) This Order does not apply in relation to —
(a) domestic premises, except to the extent mentioned in paragraph (1A) or article 31(10);
(b) an off shore installation within the meaning of regulation 3 of the Offshore Installation and Pipeline Works (Management and Administration) Regulations 1995(1);
(c) a ship, in respect of the normal ship-board activities of a ship’s crew which are carried out solely by the crew under the direction of the master;
(d) fields, woods or other land forming part of an agricultural or forestry undertaking but which is not inside a building and is situated away from the undertaking’s main buildings;
(e) an aircraft, locomotive or rolling stock, trailer or semi-trailer used as a means of transport or a vehicle for which a licence is in force under the Vehicle Excise and Registration Act 1994(2) or a vehicle exempted from duty under that Act;
(f) a mine within the meaning of section 180 of the Mines and Quarries Act 1954(3), other than any building on the surface at a mine;
(g) a borehole site to which the Borehole Sites and Operations Regulations 1995(4) apply.
(1A) Where a building contains two or more sets of domestic premises, the things to which this order applies include—
(a) the building’s structure and external walls and any common parts;
(b) all doors between the domestic premises and common parts (so far as not falling within sub-paragraph (a)).
(1B) The reference to external walls includes—
(a) doors or windows in those walls, and
(b) anything attached to the exterior of those walls (including balconies).
(2) Subject to the preceding provisions of this article, this Order applies in relation to any premises.
NB Includes proposed amendment by the Fire Safety Act 2020 in red
What the Enforcement Guidance says: