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Prolongation meaning

What does Prolongation mean?
In construction and engineering practice, prolongation is the additional time needed to complete the originally agreed (unchanged) scope of works, usually granted through an extension of time (EOT) that moves the contractual completion date. It is a descriptive industry term rather than one defined by statute; its content is shaped by contract wording (for example, JCT or NEC) and by case law on delay and loss. Key features: - It concerns time, not a change in scope (which would be a variation). - Entitlement typically depends on showing that a relevant risk event caused critical delay, and that notice and programme requirements were met. - Prolongation is distinct from acceleration (speeding up to meet an earlier date) and from the assessment of liquidated damages (for contractor delay). Prolongation often gives rise to claims for “prolongation costs” (time-related preliminaries, site overheads and associated expense) where the delay is the employer’s risk and the contract permits recovery. The assessment method and concurrency approach depend on the governing contract and applicable case law. Usage and principles are broadly consistent across England & Wales, Scotland, Northern Ireland and Ireland, though the authorities and analytical methods applied by the courts and adjudicators may differ between jurisdictions.
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View the related News about Prolongation

NEWS
Daily EU competition law round-up: General Court appeals (Teva, Red Bull, Nvidia), mergers (Liberty/Dorna, Infravia/Iliad), State aid (Croatia, Austria), Foreign Subsidies Regulation (Amcor/Berry) — 24 February 2025

Antitrust A fresh appeal has been filed before the General Court in Case T- 19/25, Teva Pharmaceutical Industries and Teva Pharmaceuticals Europe v Commission, challenging the Commission’s decision in Teva (Copaxone) (AT.40588) and requesting that the fine-imposing infringement ruling be annulled—see further, application A fresh appeal has been submitted before the General Court in Case T- 682/24, Red Bull and Others v Commission, brought against the Commission for failing to reimburse additional costs incurred due to the disproportionate prolongation of an inspection—see further, application NOTE—For all...

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NEWS
Adjudication: TCC upholds fair-and-reasonable overall valuation; macro approach defeats natural justice and reasons challenge (Clegg Food v Prestige Car) (England and Wales)

Clegg Food Projects Ltd v Prestige Car Direct Properties Ltd [2025] EWHC 2173 (TCC) What are the practical implications of this case? Clegg Food v Prestige Car confirms that, in payment disputes over overall or global valuations, adjudicators have wide latitude in their determinations, including making a 'fair and reasonable' valuation drawn from the material and submissions advanced by the parties. Losing parties should take a pragmatic stance when considering enforcement challenges—where the outcome falls within the spectrum advanced by the parties, minor irregularities or high-level reasoning will not unsettle the decision unless there is a material breach of natural justice. Highly detailed natural justice complaints, where both sides sought a global valuation, are very unlikely to succeed. What was the background? The claimant contractor (Clegg Food) and the defendant employer (Prestige Car) entered into a JCT Design and Build contract for a leisure and retail centre. After practical completion, a dispute arose regarding Application for Payment No 37 (Application 37), addressing the valuation of agreed...

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NEWS
Concurrent delay and repudiation under JCT: English TCC endorses time but no money, accepts repudiation despite invalid notice; employer's completion costs recoverable (Thomas Barnes v Blackburn)

Court considers concurrent delays and repudiation in post-termination dispute (Thomas Barnes & Sons plc (in administration) v Blackburn with Darwen Borough Council) Thomas Barnes & Sons plc (in administration) v Blackburn with Darwen Borough Council [2022] EWHC 2598 (TCC) What are the practical implications of this case? This judgment touches on several matters of real concern to construction practitioners: overlapping delay, the JCT suite’s termination machinery, and the law of repudiation. On concurrency, the court essentially affirmed the approach in Walter Lilly v Mackay, holding that where employer and contractor delays run together, the contractor will typically obtain additional time, yet will not recover the financial consequences of prolongation—often summed up as ‘time, but no money’. The court’s commentary on the rival expert delay analyses will likewise assist those preparing or defending applications for extensions of time. Among other points, it indicated in general terms, that expert opinions grounded in a careful examination of contemporaneous records ought not to be rejected merely because the techniques deployed do...

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View the related Practice Notes about Prolongation

PRACTICE NOTES
Construction extensions of time and loss and expense: procedural requirements, entitlement and proof under JCT, NEC, FIDIC and CIOB

Claims by contractors for time and/or money Requests from contractors seeking additional time and/or payment are commonplace on construction projects. A time claim seeks an extension of time (EoT) to complete the works (or achieve a contractual milestone) where a delay event has occurred, whereas a money claim typically pursues reimbursement of extra loss and/or expense incurred by the contractor due to delay or disruption to the works. Such a claim might likewise be brought by a sub-contractor under a sub-contract. These claims are usually founded on an express contractual entitlement—ie the contract specifies situations in which the contractor is entitled to time and/or money—and they are advanced and decided in accordance with the contract terms. They do not, of themselves, involve a breach of contract or require there to be a dispute between the parties, although they may ultimately give rise to one. This Practice Note outlines the key issues to consider in relation to time and money claims. Many of these points are relevant even...

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PRACTICE NOTES
Notice clauses in commercial contracts: drafting, service by post, hand and email, deemed receipt, construction, time limits, statutory defaults, proof and mistakes

Purpose A notices clause is frequently inserted into a contract to provide both sides with certainty and transparency around formal communications and the sending and receipt of notices between the parties to the agreement, including how they are given and received. Where no such clause appears, default statutory rules may step in (see Statutory provisions below). In the Court of Appeal in Khan v D’Aubigny, Nugee LJ observed that a notice can be a document that imparts information as well as one that invokes or exercises a right. It is also commonly taken to mean a written notice bearing a degree of formality, though no fixed wording or prescribed format is demanded. Observing the requirements of a notices clause will often be critical across a variety of contractual contexts. By way of illustration, it typically matters when prolonging (or stopping the prolongation of) the term of a commercial agreement, or when alerting the counterparty to a dispute, a warranty breach or an indemnity claim. Courts have applied principles concerning...

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PRACTICE NOTES
Construction Law ‘P’ Glossary: Practical completion, pay less/payment notices, partnering, procurement, principal designer/contractor, PFI/PF2

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Parent company guarantee (PCG) A PCG is an agreement between a parent company and a beneficiary under which the parent promises the subsidiary’s performance owed to that beneficiary beneath a separate contract between them (for example, a building contract). If the subsidiary fails to fulfil its obligations to the beneficiary, the parent company can be obliged either to perform those obligations itself or to repay the beneficiary for losses arising from the subsidiary’s failure to perform. See subtopic: Parent company guarantees in construction projects. Partial possession Partial possession arises when the employer takes control of one or more parts of the works before the whole project reaches practical completion; for instance, letting a completed storey to a tenant while work continues on the remaining floors. In that situation, practical completion is treated as achieved for the relevant part. See Practice...

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View the related Precedents about Prolongation

PRECEDENTS
Scott Schedule for Construction Variation Claims: Template and Examples, with JCT Guidance on Valuation, Loss and Expense, Separation from extension of time and prolongation, and Avoiding Double Recovery

Variations can also push back the completion date, and may give the Claimant a right to extra time and to prolongation costs. These elements of a variation claim are commonly pursued separately, as an extension of time claim and a prolongation costs claim. By way of illustration, the principal JCT forms provide distinct procedures: one for pricing the changed work, and another for evaluating loss and expense arising from the variation’s effect on the progress of the works (see Practice Note: JCT contracts—variations — Valuing variations under JCT contracts). Accordingly, Claimants should take care not to ‘double dip’ across the separate elements of the claims. No. Description of Variation Claimant’s case Defendant’s response Judge/Tribunal comments The Claimant intended to adopt slab foundations for block A, as depicted on the Claimant’s drawing reference XX dated XX. By email dated XX, the Defendant directed the use of piled foundations for block A...

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PRECEDENTS
Scott Schedule for construction claims: misrepresentation damages, variation-related prolongation and disruption, and interest on late interim payments—template with claimant, defendant and judge sections

Damages claim for misrepresentation, at common law and/or under the Misrepresentation Act 1967, s 2 The Claimant entered the contract in reliance on the Defendant’s assurances that every parcel of land needed for the scheme had already been secured and that former local residents supported the project. See Schedule X. The Claimant says this amounted to fraudulent misrepresentation: the assertion was untrue and the Defendant knew it. Alternatively, the statement is said to have been made negligently, as the Defendant lacked any reasonable basis for believing it was accurate. When the Contract was executed, a number of local residents refused to sell their land, and residents carried out protests within the Site for the duration of the works, which halted operations at the protest locations...

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