An interactive timeline of the events, market data and forces shaping UK electricity and gas
This dashboard maps the UK energy market from 1980 to 2030. Each on the timeline is a real event: a regulatory change, a networks milestone, a price cap movement, an acquisition, a strategic move by a supplier, a supplier failure, or a geopolitical shock. Click any dot to read the event details, why it matters, and links to the original sources.
To find a specific event quickly, use the Search button (the magnifying glass, top right) — or just press Tab or the ` key. Search looks across every event's title, description, and implications; type one or more keywords and press Enter or click a result to open it. Inside an open event you can press the magnifying glass again, or Tab / `, to jump straight back to your search.
Use the Filters section below to narrow what you see on the event timeline — by category (e.g. only show M&A), by time period, or by Story (e.g. show only events that tell the story of the 2021–2022 energy crisis). When you select a Story, its narrative will appear in the Stories section between Filters and the Timeline.
The Energy Market Data section at the bottom plots the underlying numbers — supplier market position, wholesale energy prices, inflation, the price cap, customer debt, supplier failures, consumption, the smart-meter rollout, and the electricity generation mix — switch between them using the tabs above the chart.
Standard event · Major event (larger) · Forecast / planned event (hollow, dashed)
For most of the twentieth century, electricity and gas in Britain were supplied by state-owned monopolies. The Central Electricity Generating Board produced and transmitted electricity, twelve regional boards distributed and sold it, and the British Gas Corporation did both jobs for gas. Customers had no choice of supplier and prices were set administratively rather than by any market.
That structure was dismantled over roughly a decade. The Gas Act 1986 privatised British Gas; the Electricity Act 1989 split the electricity industry into separate generation, transmission, distribution and supply businesses, which were floated from 1990 onwards. The reasoning was that generation and supply could be made competitive, while the wires and pipes were natural monopolies that would instead need economic regulation. That distinction still governs how a bill is built today.
A domestic energy bill is not a single price. It bundles together the wholesale cost of the commodity, the regulated cost of the networks that deliver it, the cost of government policy programmes, and the supplier's own operating costs and margin. Each of these is set by a different body on a different timetable.
Decarbonisation. The Climate Change Act 2008 and the later net zero target reshaped what gets built and how it is paid for. Contracts for Difference replaced earlier subsidy schemes, renewable output grew from a small fraction of generation to a substantial share.
Retail competition and its limits. Switching was intended to discipline prices, but engagement stayed low. The default tariff cap, introduced in 2019, was the regulatory answer. It now determines what a large share of households actually pay and is reset on a quarterly cycle.
Price volatility and supplier resilience. Wholesale gas prices rose sharply through 2021 and again after the invasion of Ukraine in 2022. Suppliers that had not hedged adequately failed in large numbers, their customers were transferred through the Supplier of Last Resort process, and the resulting costs were mutualised across everyone's bills. The regulatory response was a much stricter financial resilience regime, including capital adequacy requirements.
The exposure did not end there. In February 2026 military action against Iran and the subsequent closure of the Strait of Hormuz disrupted Gulf LNG exports, and UK wholesale gas prices rose sharply again. With no domestic policy lever able to offset a supply shock of that kind, the increase fed almost mechanically into the default tariff cap, driving the rise that took effect in July 2026. It was a reminder that Britain remains exposed to global gas and LNG markets regardless of how much low-carbon capacity is connected at home.
The dashboard extends to 2030 because several decisions already taken will land in that window. Market-wide half-hourly settlement changes how consumption is measured and priced. The Review of Electricity Market Arrangements is reconsidering how wholesale prices are formed, including whether they should vary by location. The clean power target for 2030 sets the pace for network build and connections reform. Events dated beyond the present are shown as forecasts rather than facts.