The Building Safety Act question of whether the Building Regulations Principal Designer role should sit within a separate appointment or an integrated one has been examined carefully from a legal and insurance perspective. What is less documented is what happens when that appointment structure meets Gateway 2 evidence review at the Building Safety Regulator, where the question is no longer contractual but evidential.

The BSR does not adjudicate on appointment structures. It reviews whether the design evidence presented at Gateway 2 is coherent, complete and accountable. Where the BR PD role sits within an integrated appointment, the operational consequences for that evidence package can be significant, and they tend to surface at the worst possible moment in the delivery programme.

What the Legal Question Establishes

The contractual and insurance implications of integrated versus separate BR Principal Designer appointments have been examined by Beale & Co in guidance published through RIBA, noting that while separation is the most defensible approach, it is not always commercially or practically achievable on every scheme.

That legal framing is correct and important. But it leaves open a connected operational question: when the BR PD sits within an integrated appointment on a higher-risk building scheme, what does Gateway 2 evidence review actually reveal about how that accountability has functioned in practice?

What Gateway 2 Evidence Review Is Actually Testing

Gateway 2 review by the Building Safety Regulator is not a contractual audit. The BSR is not reviewing appointment letters or novation agreements. It is reviewing whether the design evidence presented confirms that building regulations compliance has been planned, coordinated and owned across the full scope of the project.

That means the BSR is looking for:

clear ownership of fire strategy decisions and their structural implications;
coordinated sign-off across disciplines before submission;
evidence that the BR PD has actively managed compliance coordination, not simply been named as responsible for it;
a coherent Golden Thread that traces design decisions back to their accountability origin;
confirmation that design freeze has been reached before evidence assembly.

These are not legal questions. They are operational ones, and they are where integrated appointments most commonly create problems.

Where Integrated Appointments Create Evidence Risk

When the BR PD role sits within a firm that is also delivering design services, the structural conflict that the RIBA guidance identifies legally tends to manifest operationally as a coordination problem rather than a deliberate governance failure.

The issue is not usually that the firm is acting in bad faith. It is that the BR PD function (planning, managing and monitoring compliance coordination across all design disciplines) requires a degree of independent oversight that is difficult to maintain when the same team is also managing design delivery under programme pressure.

In practice this creates three specific Gateway 2 evidence risks.

Fragmented fire and structural accountability

Where the BR PD sits within the architect or lead designer appointment, structural and fire engineering inputs are often coordinated laterally rather than through a central compliance management function. At Gateway 2, the BSR expects to see that fire strategy assumptions have been integrated into structural design decisions and that both are owned within a coherent compliance narrative. Where that coordination has happened informally, the evidence package often reflects it; through inconsistencies in specification, unresolved interfaces and unclear ownership of compliance decisions at discipline boundaries.

Late design freeze relative to submission

Integrated appointments tend to follow design programme logic rather than compliance programme logic. The result is that design development often continues beyond the point where the Gateway 2 evidence package should have been assembled. When the submission is prepared against a moving design, the BSR review frequently identifies that the evidence does not accurately represent the current state of the design, creating revision loops that extend approval periods and introduce procurement drag.

The latest Gateway 2 Approval Index shows an average approval period of 25 weeks against a 12-week statutory target. A significant proportion of that gap is attributable to revision loops driven by incomplete or inconsistent evidence at submission, a pattern that integrated appointment structures make more likely.

Unclear Golden Thread ownership

The Golden Thread requirement is not only about information management. It is about decision traceability. The BSR expects to be able to follow a compliance decision (a fire door specification, a structural interface detail, a means of escape strategy) back to the person or role that owned it. Where the BR PD function has operated within a wider design team without clear internal separation, that traceability is often inconsistent across the submission package.

What Mature Submissions Do Differently

Project teams that move through Gateway 2 with fewer revision loops tend to treat the BR PD function as an active coordination role rather than a named responsibility. Regardless of whether the appointment is integrated or separate, the practical behaviour that produces coherent evidence tends to share several characteristics.

Design freeze is treated as a compliance milestone, not only a programme one. Fire strategy and structural design coordination is formally recorded rather than assumed from project meeting notes. Discipline sign-off against the Gateway 2 evidence requirements is captured before submission assembly begins. And the Golden Thread is structured to reflect actual decision ownership rather than appointment hierarchy.

These behaviours are achievable within an integrated appointment. But they require the BR PD function to operate with a degree of internal independence from design delivery pressure that is difficult to maintain without deliberate governance arrangements.

The Operational Consequence

Gateway 2 is creating a measurable divide between project teams whose preconstruction governance produces coherent evidence and those whose appointment structures, however legally defensible, have allowed compliance coordination to remain informal until the submission point.

As explored in Gateway 2 Is Creating a Two-Speed Construction Industry, the operational divide is now between evidence-led project teams and legacy delivery models. The BR PD appointment question is one of the structural reasons that divide exists.

For developers and contractors, the practical implication is that appointment structure alone does not determine Gateway 2 performance. What determines it is whether the BR PD function (wherever it sits contractually) has operated with sufficient independence and coordination authority to produce a submission that the BSR can assess without requesting significant additional evidence.

Evidence-Based Summary

Where the BR Principal Designer sits within an integrated appointment on a higher-risk building scheme, Gateway 2 evidence review tends to expose three operational risks: fragmented fire and structural accountability, late design freeze relative to submission, and unclear Golden Thread ownership. These risks are not resolved by contract structure alone. They are resolved by how the BR PD function has been exercised in practice — and that is what BSR evidence review is designed to test.

Primary Sources

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Expert Verification & Authorship

Mihai Chelmus
Founder, London Construction Magazine | Construction Testing & Investigation Specialist

This article draws on operational experience of Gateway 2 evidence review environments, structural investigations and construction compliance delivery across London higher-risk building schemes.

Appointment vs. Evidence: Why BR Principal Designer Roles Stall at Gateway 2

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