jharg.com

A small collection of data-driven pieces on UK energy, built on top of an electricity pricing model I've been developing.

The model covers the full cost stack for domestic electricity — network charges, policy levies, wholesale, and retail — at half-hourly resolution for all 14 GB distribution regions.

Energy

• Electricity pricing: overview — How the unit rate on your bill is built up: wholesale, network, policy levies, losses, and the formula that ties them together.
• DUoS: Distribution Use of System — Explore the network charges that vary by region and time of day, built up from DNO charging statements going back to 2022.
• TNUoS: Transmission Network Use of System — How transmission charges have evolved through TCR (2023) and RIIO-ET3 (2026), and what the official forecasts show.
• AAHEDC: High-cost distribution levy — The flat national levy that cross-subsidises northern Scotland's distribution network.

More to follow.