“to pay the Company on the first day of January in each year such sum as the Company shall estimate to be the amount prospectively payable under clause 11 of this Schedule … and until such time as the said expenses shall be calculated or estimated each of the said yearly contributions shall be in the amount of [£1,000 ] provided that:- (i) any sum received by the Company … shall be deemed to be held by the Company as bare Trustee for the Tenant to utilise .. towards the expenses incurred by the Company .. (ii) in this Schedule the expression “all costs charges and expenses which the company shall incur” shall include not only those costs charges and expenses which the Company shall have actually incurred or made during the year in question but also a reasonable sum on account of those items of expenditure which are of a periodically recurring nature (whether recurring by regular or irregular periods) whenever disbursed or made … including a sum .. by way of reasonable provision for anticipated expenditure in respect thereof as the Company may in its absolute discretion allocate to the year in question as being fair and reasonable in all the circumstances”
“Where a service charge is payable before the relevant costs are incurred, no greater amount than is reasonable is payable, [and after the relevant cost have been incurred any necessary adjustment shall be made by repayment, reduction of subsequent charges or otherwise.]”