“ "The Contractor shall make applications for interim payment as follows: ... 30.3.1.2 Where Alternative B applies, Applications for Interim Payment shall be made on the dates provided for in Alternative B in Appendix 2 and which dates shall continue up to the day named in the Employer's statement of Practical Completion or to within one month thereafter ...” (ii) Clause 30.3.3 provided that: “Not later than 5 days after the receipt of an Application for Payment the Employer shall give a written notice to the Contractor specifying the amount of payment proposed to be made in respect of that Application, the basis on which such amount is calculated, and to what the amount relates, and, subject to clause 30.30.4, shall pay the amount proposed no later than the final date for payment”. (iii) Clause 30.3.4 provided that: “Not later than 5 days before the final date for payment of an amount due pursuant to clause 30.3.3 the employer may give a written notice to the Contractor which shall specify any amount proposed to be withheld and/or deducted from that due amount, the ground or grounds for such withholding and/or deduction and the amount of withholding and/or deduction attributable to each ground.” (iv) Clause 30.3.5 provided that: “Where the employer does not give any written notice pursuant to Clause 30.3.3 and/or to Clause 30.3.4 the Employer shall pay the Contractor the amount stated in the application for interim payment.” (v) Clause 30.3.6 provided that: “The final date for payment of an amount due in an Interim Payment shall be 14 days from the date of receipt by the Employer of the Contractor's Application for Interim Payment.” (vi) Clause 30.3.7 provided that: “If the Employer fails properly to pay the amount or any part thereof due to the Contractor by the final date for its payment, the Employer shall pay to the Contractor in addition to the amount not properly paid simple interest thereon for the period until such payment is made. Payment of such simple interest should be treated as a debt due to the Contractor by the Employer. The rate of interest payable shall be 3 per cent over the base rate of the Bank of England which is current at the date that payment by the Employer became overdue ...” (vii) Clause 30.3.8 provided that: “Without prejudice to any other rights and remedies which the Contractor may possess, if the Employer shall, subject to any notice issued pursuant to Clause 30.3.4, fail to pay the contractor in full by the final date of the payment as required by the Conditions, and such failure shall continue for seven days after the Contractor has given to the Employer written notice of is intention to suspend performance of his obligations under this Contract to the Employer, and the ground or grounds on which it is intended to suspend performance, then the Contractor may suspend such performance of his obligations under the Contract to the Employer until payment in full occurs ... ”
“If before the date of practical completion the Contractor shall make a default in any one or more of the following respects: 1.1 without reasonable cause he wholly or substantially suspends the carrying out of the design or construction of the works; or 1.2 he fails to proceed regularly and diligently with the performance of his obligations under this contract ...” (ii) Clause 27.2.2 provided that: “If the Contractor continues a specified default for 14 days from receipt of the notice under Clause 27.2.1 then the Employer may on, or within 10 days from, the expiry of the 14 days by a further notice to the Contractor determine the employment of the contractor under this Contract. Such a determination shall take effect on the date of receipt of such further notice.” (iii) Clause 27.6 provided that: “In the event of the determination of the employment of the contractor under Clause 27.2 ... 27.6.1 For the purposes referred to in clause 5.5 the Contractor shall within 14 days provide the Employer with two copies of, and the Employer may retain, all drawings, details, plans, specifications, schedules and other work referred to in clause 5.6 which have been prepared before the date of determination (whether in the course of preparation or completed); 27.6.2 The Employer may employ and pay other persons to carry out and complete the design and construction of the Works and/or make good defects of the kind referred to in clause 16 and he or they may enter upon the site and the Works and use all temporary buildings, plants, tools, equipment and Site Materials and may purchase all materials and goods necessary for the carrying out and completion of the Works and/or the making good of defects as aforesaid ... 27.6.5.1 Subject to clauses 27.5.3 and 27.6.5.2 the provisions of this Contract which require any further payment or any release or further release of retention to the Contractor shall not apply provided that clause 27.6.5.1 shall not be construed so as to prevent the enforcement by the Contractor of any rights under this Contract in respect of amounts properly due to be paid by the Employer to the Contractor which the Employer has unreasonably not paid and which, where clause 27.3.4 applies, have accrued 28 days or more before the date when under clause 27.3.4 the Employer could first give notice to determine the employment of the Contractor or where clause 27.3.4 does not apply, which have accrued 28 days or more before the date of determination of the employment of the Contractor. 27.6.5.2 Upon the completion of the design and construction of the Works and the making good of defects as referred to in clause 27.6.2 (but subject, where relevant, to the exercise of the right under clause 16.2 and/or clause 16.3 of the Employer not to require defects of the kind referred to in clause 16 to be made good) then within a reasonable time thereafter an account in respect of the matters referred to in Clause 27.6.6 shall be set out in a statement prepared by the Employer.”
“The problem arises because I very much doubt whether Parliament, in enacting section 111(1), took into account that parties would enter into contracts under which the ground for withholding a payment might arise after the final date for payment. One cannot therefore find an answer in a close examination of the language of the section. I would prefer simply to say 'lex non cogit ad impossibilia' and that on this ground section 111(1) should be construed as not applying to a lawful ground for withholding payment of which it was, in the nature of things, not possible for notice to have been given within the statutory time frame. That may not be particularly elegant, but the alternative is to hold that the parties’ substantive freedom of contract has been indirectly curtailed by a mere piece of machinery, the operation of which would serve no practical purpose. This I find even less attractive.”
“The purpose of the proviso is to strike a balance between the contractor and the employer. The contractor's interest lies in enforcing the payment of sums which were already due before the determination. The employer's interest lies in retaining sums already due so that they can be set off against sums which he can properly claim against the contractor in consequence of the determination of his employment under the contract. Thus, the purpose of the clause read as a whole is to bring the contractor's right to enforced payment of any sums which have not already been paid to him by the employer to an end, except to the extent which the proviso permits, pending the making up of an account under clause 27.6.5.2.”