Navigating Dual Compliance in Securitisation Reporting Across the EU and UK
For firms active in securitisation, Brexit did not simply add another reporting obligation. It created an operating challenge: how to support two closely related but increasingly distinct regulatory regimes without duplicating platforms, teams and controls. For banks, issuers, servicers and market infrastructure providers, the question is no longer whether reporting must adapt. It is how to do so at speed, with confidence, and without building a separate compliance stack for every jurisdiction.
Publicis Sapient’s work with European DataWarehouse (EDW) offers a practical model. While the transformation began with modernization of a repository platform, its deeper value lies in how the platform was designed to support parallel ESMA and FCA requirements on a shared foundation. The result is a blueprint for dual compliance that combines multi-instance architecture, reusable components and agile delivery to help organizations respond to regulatory divergence while maintaining data quality, continuity and speed to change.
The real challenge: divergence without disruption
The introduction of the EU Securitisation Regulation created a major shift in how securitisation data had to be collected, validated and reported. EDW needed to transform quickly to support new regulatory and technical standards, enable compliant reporting for public and private securitisations, and process much larger volumes of loan-level data with more validation steps.
Then came a second wave of complexity. Post-Brexit, UK requirements under the FCA had to be supported alongside EU requirements under ESMA. For many organizations, this is where operating costs and delivery risk rise sharply. Separate regimes often lead to separate workflows, separate implementations and duplicated maintenance. Over time, those duplications slow down regulatory change, increase data inconsistency and make resilience harder to sustain.
What firms need instead is a model that recognizes regulatory separation without forcing technical fragmentation.
A shared platform for separate regimes
In its work with EDW, Publicis Sapient helped create a cloud-based regulatory reporting platform on Microsoft Azure designed to collect, process, validate and store securitisation-related loan-level data and related documentation at scale. The platform supports real-time processing and validation of billions of records, along with completeness checks and quality assessment.
The critical design choice was not simply cloud adoption. It was the use of a scalable multi-instance architecture that allowed EDW to support EU and UK reporting environments in parallel while maintaining a shared technical foundation. That meant separate regulatory regimes could be managed distinctly, but without building entirely separate platforms.
This matters because dual compliance is rarely solved by pure standardization. ESMA and FCA requirements may overlap, but they also evolve independently. A multi-instance model creates the right balance: enough separation to address jurisdiction-specific rules, and enough commonality to preserve efficiency, governance and control.
Why reusable architecture changes the economics of compliance
One of the clearest lessons from the EDW transformation is the value of architectural reusability. Up to 80% of the core solution architecture was reusable across jurisdictions. That significantly changes the economics of regulatory change.
Instead of treating each new regime as a fresh build, firms can reuse proven components across data ingestion, validation, workflow, storage and user experience. Jurisdiction-specific differences can then be layered where they belong, rather than embedded throughout the entire stack.
For leaders responsible for compliance, operations and technology, this approach offers several practical advantages:
- **Faster rollout of new jurisdictional requirements** by reusing established core components
- **Lower implementation effort** when standards or templates change
- **Greater operational consistency** across reporting environments
- **Reduced risk of control gaps** caused by duplicated logic and fragmented processes
- **A more scalable path** for expansion into future regulatory contexts
In EDW’s case, the approach also supported measurable performance and delivery gains, including 10x improved processing speed and a 50% reduction in template implementation.
Data quality is the operating backbone of dual compliance
Parallel regimes are not only a rules problem. They are a data problem. If firms cannot maintain consistent, validated and complete loan-level data across multiple reporting environments, dual compliance quickly becomes manual, error-prone and expensive.
That is why the EDW platform emphasized automated validation, completeness checks and quality assessment as core capabilities. The objective was not just to move reporting to the cloud. It was to improve the integrity and usability of the reporting process itself.
For issuers and servicers, that means a smoother path to submitting compliant data. For investors and regulators, it means more consistent and transparent information. For market infrastructure providers, it means the platform can serve multiple stakeholders without sacrificing control.
In practice, strong data quality capabilities also help organizations absorb regulatory change more effectively. When new templates, validation rules or technical standards are introduced, firms with reusable validation pipelines and shared quality controls can adapt faster than those managing reporting through disconnected local solutions.
Continuity matters as much as modernization
Regulatory transformation cannot come at the expense of market continuity. That is especially true in securitisation, where reporting platforms sit at the center of operational workflows and stakeholder trust.
Publicis Sapient addressed this in the EDW program through an incremental modernization approach. Rather than replacing everything at once, the team used a “strangler” approach to modernize functionality step by step, reducing risk while maintaining continuity. Agile delivery, DevOps and continuous delivery practices supported frequent change without destabilizing the platform.
This is an important lesson for organizations facing dual compliance today. The goal should not be a one-time replacement project that introduces unnecessary operational exposure. It should be a controlled transformation model that lets firms modernize while continuing to serve reporting entities, regulators and investors without interruption.
A practical model for banks, issuers, servicers and market infrastructure providers
Organizations navigating EU and UK securitisation reporting need more than a technology upgrade. They need an operating model built for divergence. That model should include:
- **A multi-instance architecture** to support distinct regimes in parallel
- **Reusable core services and components** to avoid rebuilding compliance capabilities jurisdiction by jurisdiction
- **Automated validation and quality controls** to protect transparency and due diligence
- **Agile delivery and continuous deployment** to respond quickly to regulatory updates
- **Incremental modernization** to reduce implementation risk and maintain continuity
This is the strategic value of the EDW transformation. It demonstrates that firms do not have to choose between local compliance and shared efficiency. With the right architecture and delivery approach, they can support diverging ESMA and FCA requirements on a common platform, preserve data quality, and stay ready for the next wave of change.
For financial institutions operating across borders, that is no longer a nice-to-have. It is becoming the baseline for sustainable compliance.