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Usually, an employer cannot simply remove work that was awarded to a contractor and give it to somebody else. The common-law starting point is that a building contract gives the contractor both a duty to perform the agreed work and a corresponding right to perform it. An omission is therefore safest when an express term authorises it, the instruction stays within that term, and the contract clearly deals with any proposed transfer of the work.
The crucial distinction is between omitting work because the employer no longer wants or needs it and omitting it so another contractor can carry it out. The second situation requires particularly clear contractual wording. The executed contract, its amendments and the facts of the project control the outcome; a standard-form example cannot answer a dispute by itself.
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The starting rule: agreed work cannot usually be taken away at will
At common law, an employer has no general right to omit part of the agreed scope merely because circumstances have changed or a cheaper supplier has become available. The contractor has undertaken to carry out the work, but the bargain also gives it the opportunity to complete that work. Removing it without contractual authority can interfere with the deal the parties made.
That protection has a practical rationale. A contractor may have declined other opportunities, hired staff, ordered specialist equipment, arranged subcontractors or priced its overheads on the assumption that the full scope would remain available. The right to perform is not just an incidental benefit; it is part of what the contractor contracted to receive.
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This is the general principle identified in a Building article by James Worthington and Vanessa Jones published on 4 September 2020. It is a starting point, not a substitute for reading the project documents. The question on a particular project is first contractual: does the executed agreement contain a power to omit, and what does that power actually say?
Find the express power in the executed contract
An employer should look for an express variation or change provision before issuing an omission instruction. The relevant wording may be in the main conditions, amendments, schedules, employer’s requirements, pricing documents or a bespoke supplemental agreement. A clause in a tender form or an unincorporated draft is not enough if it did not become part of the signed contract.
JCT Design and Build Contract 2016 as an example
The companion discussion in the Winter 2020 issue of Construct.Law uses the JCT Design and Build Contract 2016 as an illustration. In that edition, the definition of a “change” includes an instruction for the “addition, omission or substitution of any work”. That demonstrates how a standard form can confer an omission power.
It does not establish the wording in every JCT edition, nor does it prove that an unamended 2016 form governs a particular project. Parties commonly amend standard forms, and project-specific schedules can qualify or replace the printed text. Check the contract actually executed, including all amendments and documents incorporated by reference.
Read the whole mechanism, not one sentence
An omission definition rarely operates alone. Read provisions dealing with who may instruct a change, the required form of an instruction, valuation, notices, programme effects, payment, design responsibility and dispute escalation. A clause may permit an omission but impose procedural conditions. Failure to follow those conditions can create a separate argument even where the subject matter would otherwise fall within the definition.
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Omission is not automatically a right to transfer the work
The most important distinction is why the work is being removed. If the employer no longer requires a package, an omission clause may be intended to allow the scope to be deleted, subject to its limits. If the employer wants the same package performed by another contractor, the instruction is doing more than reducing the works: it is reallocating an opportunity that formed part of the original bargain.
Those outcomes should not be treated as interchangeable. A clause that permits “omission” may be read as allowing genuine deletion without necessarily allowing the employer to take the work out of the contract and award it elsewhere. The wording must be examined for a clear answer on reassignment, alternative performance or work carried out by the employer.
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In Abbey Development Ltd v PP Brickwork Ltd [2003] EWHC 1987 (TCC), decided on 4 July 2003, the court addressed the contractor’s opportunity to complete its contracted works. HHJ Humphrey Lloyd QC stated:
“A contract for the execution of work confers on the contractor not only the duty to carry out the work but the corresponding right to be able to complete the work which it contracted to carry out.”
The judgment indicates that reasonably clear contractual wording is needed where an employer seeks to remove work simply so that someone else can do it. The case is an illustration of the interpretive risk, not an automatic answer for every contract. Its effect on a live project depends on the actual clause, the surrounding terms and what the employer is trying to achieve.
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Questions to ask about a proposed transfer
- Does the clause expressly say that omitted work may be given to another contractor or performed by the employer?
- Does it distinguish deletion from substitution, reallocation or separate procurement?
- Is the proposed instruction genuinely reducing the employer’s requirements, or is the same work still required in substantially the same form?
- Does another provision address interfaces, access, design responsibility, warranties, insurance or coordination when a package is moved?
If the contract is silent or ambiguous on these points, an employer should not assume that a general omission power authorises transfer. The contractor may contend that the instruction deprives it of its contractual opportunity, even if the employer labels the instruction an omission.
Limits on an omission clause
An express power is not unlimited. The Winter 2020 Construct.Law discussion identifies a boundary: an employer cannot use an omission instruction to change the fundamental characteristic of the works or the basic bargain between the parties. The remaining work must still be identifiable as the works that were contracted for.
Fundamental character of the works
Consider whether the proposed deletion leaves the project recognisably the same undertaking. Removing a discrete, non-essential item may be different from removing the central package that defines the project. The test is fact-sensitive. Describe the original scope, the proposed deletion and the work left behind, then ask whether the project has retained its essential identity.
The basic bargain
The bargain includes more than the final price. It can include the scale and composition of the work, the contractor’s assumed sequencing, specialist capability and the commercial opportunity to execute the package. An instruction that strips out a substantial or commercially important part may be challenged as changing the bargain rather than adjusting it.
Remaining works must remain identifiable
After the omission, the remaining scope should be capable of being identified by reference to the contract documents. If drawings, specifications, bills or employer’s requirements no longer describe a coherent set of works, the instruction may be moving beyond an ordinary change. Record precisely what is deleted and what remains, including interfaces and temporary works affected by the change.
A practical comparison of proposed instructions
| Issue | What to check | Why it matters |
|---|---|---|
| Express authority | Does the executed contract authorise omission or change, and who may instruct it? | Without contractual authority, the common-law starting point does not give the employer a general omission right. |
| Reassignment wording | Does the clause clearly permit omitted work to be performed by another contractor or the employer? | Omission and transfer are different effects; clear wording is especially important for transfer. |
| Nature of the deletion | Is the employer abandoning the work, or procuring the same work elsewhere? | The reason for the omission can determine whether the instruction is within the clause. |
| Character of the project | Does the remaining scope preserve the fundamental character of the works? | An omission cannot be used to transform the project into a materially different bargain. |
| Identifiable scope | Can the remaining work and interfaces still be defined from the contract documents? | Unclear residual scope increases valuation, coordination and interpretation disputes. |
| Basic bargain | How does the change affect the contractor’s expected opportunity, resources and commercial allocation? | A substantial removal may be argued to alter the bargain rather than make a permitted adjustment. |
These are comparison criteria, not a mechanical legal test. Applying them requires the contract and project evidence.
Step-by-step process for an employer considering an omission
- Assemble the governing documents. Obtain the signed conditions, amendments, schedules, employer’s requirements, contractor’s proposals, pricing documents and any agreed clarifications. Confirm which version and edition was incorporated.
- Map the original scope. Identify the work proposed for removal, its value, design responsibility, programme position, specialist elements, interfaces and any materials or equipment already procured.
- Locate the authority. Read the variation or change clause with its definitions, instruction procedure and valuation provisions. Check whether an omission is expressly listed and whether there are restrictions on its use.
- Classify the objective. State in writing whether the employer no longer requires the work, intends to perform it itself, or intends to appoint another contractor. Do not describe a transfer as a simple deletion without analysing the consequence.
- Test the limits. Assess the fundamental character of the remaining works, the basic bargain and whether the residual scope is identifiable. Consider whether the deletion removes a defining or commercially significant package.
- Check reassignment language. Look for reasonably clear wording covering work carried out by others, separate contractors, employer-supplied work or substitution. If the contract does not clearly address the point, obtain construction-law advice before instructing.
- Follow the notice and instruction procedure. Use the contract’s required form, authorised signatory and communication route. Describe the omitted items by drawing, specification, activity or other objective reference, and state the effective date.
- Deal with consequences. Apply the contractual valuation, payment, programme, access, design, insurance and coordination provisions. Identify who owns materials, information and warranties and how interfaces will be managed.
- Preserve evidence. Keep the commercial reason, meeting records, cost information, programme analysis, procurement commitments and the contractor’s response. A clear contemporaneous record helps distinguish a genuine deletion from a transfer dispute.
How a contractor should respond
A contractor receiving an omission instruction should first reserve its position without obstructing performance. Check the clause, the instruction’s form, the scope description and the stated reason. Compare the proposed deletion with the original pricing and programme assumptions.
Immediate checks
- Is the instruction issued by a person with contractual authority?
- Does it identify work that was within the original scope?
- Does it say, or imply, that another contractor will perform the same work?
- Has the employer followed notice, valuation and programme procedures?
- What commitments have already been made to subcontractors, suppliers, employees or equipment providers?
Ask for clarification where the instruction is vague, especially about interfaces and the intended replacement contractor. Provide records of unrecoverable commitments and disruption in the manner required by the contract, while avoiding an assumption that every cost is automatically payable. The contract’s valuation and notice rules govern what can be claimed.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Valuation, payment and practical interfaces
An omission changes the work to be valued, but the financial result cannot be inferred from the word “omission” alone. Apply the contract’s valuation rules and any agreed pricing documents. Check how the clause treats preliminaries, overheads, profit, design fees, materials ordered, demobilisation, protection of completed work and costs caused by resequencing.
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchTransfer creates additional operational risks. A replacement contractor may need access through areas controlled by the original contractor, information prepared by it, temporary works, surveys, testing records or interfaces with its installations. The omission instruction should allocate those responsibilities expressly. Otherwise, a scope reduction can produce disputes about delay, defects, protection and coordination even if the legal authority to omit is accepted.
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Illustrative scenarios
The employer cancels a work package
Suppose the employer decides that a planned feature is no longer required and removes the feature entirely. The analysis still starts with the express omission power, the clause’s limits and the valuation mechanism. If the remaining project retains its fundamental character and the instruction complies with procedure, this is closer to a genuine deletion than a transfer. The conclusion remains dependent on the executed wording.
The employer appoints a specialist instead
Suppose the employer removes the same feature but appoints a specialist contractor to install it. The work has not disappeared; the employer is reallocating it. That is the risk addressed by Abbey Development. Look for clear wording authorising work to be performed by others, then test whether the instruction changes the basic bargain or creates interface obligations that the contract does not address.
The employer performs part of the work itself
If the employer’s own team will carry out the omitted activities, the transfer issue remains. The relevant question is not who receives payment but whether the contractor’s contractual opportunity is being removed. The clause should be checked for wording covering employer-performed work, and the parties should document access, design, safety and coordination responsibilities.
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Drafting and administration checklist
Parties preparing or amending a building contract can reduce uncertainty by stating expressly:
- what counts as an omission, substitution, reallocation or employer-performed work;
- whether omitted work may be awarded to another contractor;
- how the employer must identify the deleted scope;
- which person may issue the instruction and in what form;
- how the omission is valued and how committed costs are treated;
- how design, information, access, warranties, insurance and temporary works are allocated after transfer;
- what limits protect the fundamental character of the works and the basic bargain; and
- how disputes about authority, valuation or interfaces are escalated.
Administration should follow the drafting. Keep a change register, cross-reference each instruction to the relevant drawings and specifications, record the reason for the change and obtain acknowledgement of the revised scope. Clear records cannot create an omission power that the contract lacks, but they can show what was instructed and when.
When specialist advice is necessary
Obtain advice before acting where the contract is amended, the omission is substantial, the work will be transferred, the contractor has procured specialist resources, or the instruction would leave a materially different project. The legal issue is highly dependent on wording and facts. A general statement that “variations include omissions” is not enough to predict the result.
The sources discussed here provide general principles rather than a determination of any reader’s dispute. The Building article was published on 4 September 2020, the companion material appeared in the Winter 2020 Construct.Law issue, and Abbey Development Ltd v PP Brickwork Ltd was decided on 4 July 2003. Standard-form wording may change, and amendments may be decisive, so use the version that governs the project.
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