(1)Any party to a long lease of a flat may make an application to the court for an order varying the lease in such manner as is specified in the application.
(2)The grounds on which any such application may be made are that the lease fails to make satisfactory provision with respect to one or more of the following matters, namely—
(a)the repair or maintenance of—
(i)the flat in question, or
(ii)the building containing the flat, or
(iii)any land or building which is let to the tenant under the lease or in respect of which rights are conferred on him under it;
(b)the insurance of the flat or of any such building or land as is mentioned in paragraph (a)(ii) or (iii);
(c)the repair or maintenance of any installations (whether they are in the same building as the flat or not) which are reasonably necessary to ensure that occupiers of the flat enjoy a reasonable standard of accommodation;
(d)the provision or maintenance of any services which are reasonably necessary to ensure that occupiers of the flat enjoy a reasonable standard of accommodation (whether they are services connected with any such installations or not, and whether they are services provided for the benefit of those occupiers or services provided for the benefit of the occupiers of a number of flats including that flat);
(e)the recovery by one party to the lease from another party to it of expenditure incurred or to be incurred by him, or on his behalf, for the benefit of that other party or of a number of persons who include that other party;
(f)the computation of a service charge payable under the lease.
(3)For the purposes of subsection (2)(c) and (d) the factors for determining, in relation to the occupiers of a flat, what is a reasonable standard of accommodation may include—
(a)factors relating to the safety and security of the flat and its occupiers and of any common parts of the building containing the flat; and
(b)other factors relating to the condition of any such common parts.
(4)For the purposes of subsection (2)(f) a lease fails to make satisfactory provision with respect to the computation of a service charge payable under it if—
(a)it provides for any such charge to be a proportion of expenditure incurred, or to be incurred, by or on behalf of the landlord or a superior landlord; and
(b)other tenants of the landlord are also liable under their leases to pay by way of service charges proportions of any such expenditure; and
(c)the aggregate of the amounts that would, in any particular case, be payable by reference to the proportions referred to in paragraphs (a) and (b) would exceed the whole of any such expenditure.
(5)Rules of court shall make provision—
(a)for requiring notice of any application under this Part to be served by the person making the application, and by any respondent to the application, on any person who the applicant, or (as the case may be) the respondent, knows or has reason to believe is likely to be affected by any variation specified in the application, and
(b)for enabling persons served with any such notice to be joined as parties to the proceedings.
(6)For the purposes of this Part a long lease shall not be regarded as a long lease of a flat if the demised premises consist of or include—
(a)the flat and one or more other flats, or
(b)the flat and any common parts of the building containing the flat.
(7)This Part does not apply to a long lease of a flat if it constitutes a tenancy to which Part II of the [1954 c. 56.] Landlord and Tenant Act 1954 applies (other than an assured tenancy as defined in section 56(1) of the [1980 c. 51.] Housing Act 1980).
(8)In this section "service charge" has the meaning given by section 18(1) of the 1985 Act.