“the incurring of costs entails the existence of an ascertained or ascertainable sum which is capable of being adjusted by repayment, reduction etc. The mere provision of services or supplies does not without more entail anything which is capable of being adjusted in this way.”
“In such circumstances, it seems to me that the right approach must be to attempt to construe the relevant statutory provision in its legislative context, and having reached a provisional conclusion as to what it means, to test that meaning to see whether it would, if adopted, lead to such absurd consequences in practice that Parliament cannot possibly have intended it. If the provisional conclusion would lead to absurd consequences, then it may be necessary to revisit it.”
“If any of the [costs … incurred by or on behalf of the landlord, or a superior landlord] taken into account in determining the amount of any service charge were incurred more than 18 months before a demand for payment of the service charge is served on the tenant, then (subject to subsection (2)), the tenant shall not be liable to pay so much of the service charge as reflects the costs so incurred.”