Why Agile prices differ by region
The UK electricity grid is divided into 14 Distribution Network Operator (DNO) regions. Each region has its own network charges - the cost of maintaining local infrastructure and transporting electricity from generation sources to homes. These charges form part of the wholesale price and create regional price variation.
Three factors drive the differences between regions on Agile:
- Local generation surplus. A region with abundant wind or solar generation frequently produces more electricity than local demand requires. That surplus drives local wholesale prices down - and those low prices feed directly into Agile half-hourly rates.
- Transmission costs. Moving electricity from a wind farm in the Scottish Highlands to a home in London costs money. Regions far from generation sources pay more to import that power. Regions close to generation benefit from lower transmission costs.
- Local demand concentration. Dense urban areas create sustained demand peaks. London's 9 million people all arriving home and switching on appliances at the same time drives prices up far more sharply than a rural area with spread-out demand.
The result is that two identical households - same appliances, same usage patterns, same engagement with Agile - will see materially different bills depending on their postcode. This is not a flaw in Agile; it reflects the real economics of the UK electricity system.
The regions with historically cheapest overnight rates
Three regions consistently appear at the bottom of the Agile price range - meaning cheapest overnight rates, most plunge pricing events, and highest savings potential for engaged customers.
South West England
Cornwall and Devon sit at the end of a peninsula that generates significant renewable electricity from offshore wind and, increasingly, tidal and marine energy. Population density is low, meaning local demand is modest relative to generation capacity. When offshore wind ramps up overnight, the South West frequently sees surplus generation that drives Agile prices to 2-4p/kWh or lower. The region records some of the highest frequencies of plunge pricing events in England.
Scotland North
Scotland as a whole generates nearly twice its total electricity consumption from renewables. The north of Scotland - home to extensive onshore and offshore wind farms - frequently produces far more electricity than Scottish homes and businesses consume. That surplus is exported south, but local Agile prices reflect the generation abundance. Northern Scotland records some of the lowest average overnight Agile prices in Great Britain.
Wales
A combination of onshore wind generation in mid-Wales and hydro generation in the Snowdonia region gives Wales a renewable generation profile that regularly exceeds local demand during overnight periods. Welsh Agile prices trend towards the cheaper end of the national range, particularly overnight and at weekends when industrial demand drops.
South West: the renewables advantage explained
The South West's Agile advantage goes beyond overnight prices. Daytime solar generation in summer creates cheap afternoon windows - often 1pm to 4pm - where Agile prices drop well below the overnight rate. This gives South West customers double the opportunity: cheap nights from wind, and cheap afternoons from solar in summer months.
The region also benefits from Atlantic storm systems that bring strong wind generation to south-west England first, before tracking northeast. During windy winter nights, South West Agile prices regularly touch negative values - meaning Octopus pays you to use electricity.
For a household with a washing machine, dishwasher, and tumble dryer in Cornwall or Devon, annual Agile savings of £480-550/year are achievable with consistent overnight scheduling. Add an EV and that figure pushes past £700/year.
Scotland and Northern England: the wind generation premium
Scotland's wind generation capacity is extraordinary. In 2025, wind power supplied approximately 30% of the UK's total electricity. A disproportionate share of that generation sits in Scotland and Northern England. On windy nights - and there are many - Scottish and Northern England Agile prices frequently reach 1-3p/kWh. Negative pricing events in these regions are not unusual during winter storm systems.
Northern England - Yorkshire, the North East, Cumbria - shares this wind surplus benefit. Offshore wind in the North Sea feeds into the Northern England grid. Overnight prices in these regions regularly undercut the UK average by 1-2p/kWh, which translates to meaningful additional savings over a full year.
For a household in Scotland or Northern England with an EV, Agile overnight charging can cost as little as 1-2p/kWh on the best nights. Charging a 60kWh EV battery from empty to full costs 60-120p. That same charge on a standard 26.11p tariff costs £15.67. The difference is staggering.
London and South East: why prices tend to be higher
London and the South East face a structural Agile disadvantage. The reasons are straightforward:
- Highest population density in Great Britain creates concentrated demand peaks
- Limited local generation - London has almost no wind or solar capacity at grid scale
- High transmission costs to import power from wind-rich regions in the north and south-west
- Network charges in the South East DNO region are among the highest in the country
London and South East Agile prices average 3-5p/kWh higher overnight than Scotland North, and peak prices during cold snap evenings regularly exceed South West equivalents by 8-12p/kWh.
This does not make Agile a bad choice for London households. The overnight advantage still exists - 5-7pm peak prices of 30-40p vs overnight prices of 6-10p is still a 4-6x difference. Engaged London Agile customers typically save £280-380/year. That is meaningful money. It is simply less than the equivalent saving in Scotland or the South West.
Regional savings comparison
| Region | Typical overnight rate | Plunge events/month | Est. annual saving (no EV) |
|---|---|---|---|
| Scotland North | 1-4p/kWh | 8-12 | £460-540 |
| South West England | 2-5p/kWh | 7-11 | £440-520 |
| Wales | 2-5p/kWh | 6-10 | £420-490 |
| North West England | 3-6p/kWh | 5-9 | £380-450 |
| East Midlands | 4-7p/kWh | 5-8 | £350-420 |
| South East England | 5-9p/kWh | 4-7 | £290-360 |
| London | 6-10p/kWh | 3-6 | £260-340 |
Estimates based on average 3,800 kWh annual usage, consistent overnight appliance scheduling, no EV. Regional ranges reflect seasonal variation.
How to check your region's historical data
Before switching, it is worth looking at actual historical data for your DNO region rather than relying on averages. Several free tools make this straightforward:
- AgileAlert live dashboard - shows current prices for all 14 regions side by side. Check your region's prices now to see tonight's overnight window.
- energy-stats.uk - provides historical half-hourly price data by region, allowing you to calculate actual averages for any period.
- The Octopus app - once you are a customer, shows your region's upcoming 24 hours of prices each afternoon when they are published.
Look at overnight averages for the most recent 3 months in your region. If you see a consistent pattern of prices below 8p/kWh between midnight and 6am, you have a strong base case for switching to Agile.
Does region make or break the case for Agile?
No. Even in London - the least favourable major region - an engaged Agile customer with a washing machine, dishwasher, and dishwasher can save £280-340/year compared to the standard variable tariff at 26.11p/kWh. That is money back in your pocket every month simply by running appliances at night instead of the evening.
The region determines whether your saving is £300/year or £500/year. It does not determine whether Agile saves you money at all. The overnight opportunity exists everywhere in Great Britain. What varies is the size of that opportunity.
For households in Scotland, the South West, or Wales with EVs, the case for Agile is overwhelming. For a London flat with no EV and gas heating, the saving is more modest - but still real, and still better than doing nothing. Read the honest guide to who shouldn't switch to check whether Agile genuinely fits your household before deciding.