The London roadmap as a six-gate evidence chain to Ofgem The roadmap exists because Ofgem reads it, so each of six gates names the function that owns it, the milestone it clears and the artefact it files, and the chain is only defensible end to end once first-year operation is evidenced at the closing gate.
The London roadmap as a six-gate evidence chain to Ofgem
A vertical evidence ladder of six RIIO-ED roadmap gates joined by downward arrows, with a left axis reading evidence accumulates. G1 Commitment, owned by the Board, files the signed commitment. G2 Design, owned by Architecture, files the vision with Ofgem. G3 Build, owned by Delivery, files build evidence packs. G4 Test, owned by Pilot, files pilot reports and test passes. G5 Release, owned by Go-live, files go-live evidence and a rollback path. G6 Operate, owned by Operations and tinted as the closing gate, files first-year operational evidence, the point where the roadmap becomes defensible end to end.
Evidence accumulates G1 Commitment RIIO-ED commitment is signed off Filed: signed board commitment Board designs G2 Design Architecture vision is agreed Filed: vision lodged with Ofgem Architecture builds G3 Build Delivery teams complete the build Filed: build evidence packs Delivery tests G4 Test Pilots pass their acceptance tests Filed: pilot reports and test passes Pilot releases G5 Release Service goes live with a rollback path Filed: go-live evidence and rollback Go-live operates G6 Operate First year of operation is evidenced Filed: first-year operational evidence Operations
