Electricity North West Vulnerability Disclosure
A vulnerability-reporting route exists for this API, but it belongs to the platform vendor rather than to the network operator. The Opendatasoft (Huwise) tenant that serves the SP Electricity North West open data API publishes an RFC 9116 security.txt at the API host root, and the vendor's security page names a security team address and describes an incident-handling process. Electricity North West itself publishes nothing reachable: www.enwl.co.uk sits behind a Cloudflare managed challenge that returns HTTP 403 to every non-browser client, so its /.well-known/security.txt could not be retrieved or ruled out.
Electricity North West runs a coordinated vulnerability disclosure program on Hackerone. A machine-readable /.well-known/security.txt is served. A dedicated security contact is published.