# Tags: Electricity Tariffs

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## [Smart Tariff API Rules: What Changes for UK Homes](/resources/smart-tariff-interoperability-api-uk/)

**By:** David Coleman · **Published:** 2026-11-05 19:48:26 · **Updated:** 2026-11-05 11:48:35

Great Britain has confirmed Phase 1a tariff API rules. See the November code change, planned February 2027 launch and what appliance owners should check.

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[Read Smart Tariff API Rules: What Changes for UK Homes](/resources/smart-tariff-interoperability-api-uk/)