This deliverable (D20.1) presents the Second Deployable Demonstrator of Digital Objects & Workflows (hereafter, the Demonstrator) developed under WP20 - Workflow Processing. It builds on Year 1 outputs D19.1, which provided the initial demonstrator and architectural approach for using RO-Crates and workflow technologies in TREs. In Year 2, the Demonstrator has matured into a fully deployable, federated prototype and demonstrated its capacity to run a cross-TRE “data pooling” federated analysis between TRE-FX (UNOTT) and TRE-BSC. The Year 2 focus has been on improving deployment realism while enabling Five Safes–compliant executions, strengthening provenance, and enhancing federated interoperability. Development efforts centred around: Adopting Five Safe TES principles, enabling policy-aware task execution across TREs using a common GA4GH TES interface. Deployment of the Demonstrator in two ENTRUST TREs, aligning execution semantics across sites. A production-ready RO-Crate Validation Service, supporting SHACL-based validation. Enhancements to WfExS and Five Safe TES tooling for secure secrets handling within TREs Validation of the Demonstrator in Driver use cases Through these improvements, WP20 now provides a demonstrator capable of federated, provenance-rich, policy-aware execution, consistent with the Five Safes principles and usable by TREs with heterogeneous compute backends. The demonstrator provides a technical foundation for further alignment with WP18 (AAAI) on accountability capture, and integrates with ongoing UK efforts such as DARE UK TREvolution.