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This paper covers a commercially-ready QKD metro network built in London, complete with customer access tails and an aggregated central metro node, able to support multiple customers. The solution includes a full Key Management System; encrypted classical Ethernet data on the same fibre and a Data Communications Network (DCN) for full remote monitoring at BT’s Network Operations Centre (NOC).

EY becomes first commercial customer to connect quantum secure data transmission between its major London offices.

The network will connect sites in London’s Docklands, the City and the M4 Corridor, and provide data services secured using Quantum Key Distribution (QKD) and Post-Quantum Cryptography (PQC)