Annexe 3

Annexe 3 contains tariffs for "closed" LLFC codes - legacy tariff categories that are no longer assigned to new connections but still apply to existing meter points. These preserved tariffs ensure existing customers continue to be billed correctly even though their LLFC code is no longer in active use.

Why Annexe 3 exists: Over time, DNOs rationalise their LLFC codes, closing old codes and directing new connections to standardised alternatives. However, existing supplies retain their original LLFC, so the tariffs must continue to be published.

What Annexe 3 contains: The same rate components as standard CDCM tariffs:

• Red, Amber, Green unit rates (p/kWh)
• Fixed charges (p/MPAN/day)
• Capacity charges (p/kVA/day)
• Reactive power charges (p/kVArh)

Closed vs Open LLFCs:

• Open LLFCs (in Annexe 1): Currently assignable to new connections
• Closed LLFCs (in Annexe 3): No longer issued but still valid for existing supplies

Important for bill validation: If your MPAN has a closed LLFC, your tariff rates are in Annexe 3, not Annexe 1. Using rates from the wrong annexe would result in incorrect validation.