Fourteen GSP groups
Electricity tariff regions
A Grid Supply Point (GSP) group is the fourteen-region geography used by electricity tariff codes in Great Britain. The letter identifies the same tariff region as the readable name and slug below.
Find your tariff region
Use Octopus Energy's postcode lookup to identify the GSP group used for your address.
All fourteen GSP groups
| GSP | Region | Tariff tools |
|---|---|---|
| A | Eastern England eastern-england | Agile rates |
| B | East Midlands east-midlands | Agile rates |
| C | London london | Agile rates |
| D | Merseyside and North Wales merseyside-and-north-wales | Agile rates |
| E | West Midlands west-midlands | Agile rates |
| F | North East England north-east-england | Agile rates |
| G | North West England north-west-england | Agile rates |
| H | Southern England southern-england | Agile rates |
| J | South East England south-east-england | Agile rates |
| K | South Wales south-wales | Agile rates |
| L | South West England south-west-england | Agile rates |
| M | Yorkshire yorkshire | Agile rates |
| N | Southern Scotland southern-scotland | Agile rates |
| P | Northern Scotland northern-scotland | Agile rates |
Similar names, different geographies
A GSP group is used for electricity tariff regions. An Ofgem price-cap region is a separate regulatory mapping, even where its label looks similar. A distribution licence area describes a network operator's area, while a TNUoS demand zone is the transmission charging geography.
We do not treat distribution licence areas or TNUoS zones as GSP groups without a verified crosswalk. Northern Ireland is excluded because it is a separate electricity market and has no Great Britain GSP group.