The UK is not just participating. It is executing — commercially. From $1B+ national investment to billion-dollar exits, the ecosystem is now fully structured across hardware, software, security, and defense. Key signals: • Over 75+ active quantum companies across the stack • $1.075B acquisition of Oxford Ionics — a defining global validation moment • Quantinuum targeting $20B+ IPO valuation • Government committing £670M for sovereign quantum capability • Strong commercial

This paper empirically validates the theoretical frameworks presented in "A Quantum Technology Adoption Framework" [2] and "Why QRNG Confuses PQC" [3]. We conducted a series of file encryption and decryption experiments using NIST-standardized Post-Quantum Cryptography (PQC) algorithms on a defined dataset of PDF and large-scale video files. The performance metrics, including speed and throughput for various KEM and digital signature algorithms (ML-KEM, ML-DSA, Falcon, SPHINC