What are you looking for?
The Gemini System
Gemini is a suite of online applications used by National Grid and its business associates to manage the transport of gas through pipelines.
Gemini includes applications for essential gas market processes:
- Capacity Management
- Capacity Trading
- Commercial Balancing
Each of these applies to a specific phase in the transfer of the gas, managing processes for:
- Entry Capacity and Entry Capacity Invoicing
- Energy Balancing and Energy Balancing Invoicing
- Exit Capacity and Exit Capacity Invoicing
The Gemini suite is separated into two different applications:
- Gemini Exit
Logging into Gemini
The Gemini application is only supported by Internet Explorer 11 (IE11). It also requires the installation of:
- Citrix Receiver software
- Please also read the Citrix User Guide for Customising Gemini Access
- Information Exchange (IX)
As Gemini uses the Citrix application to run, two User IDs are needed:
- One ID is used to log into Citrix
- One ID is configured and used for Gemini
Gemini works on a role-based system, with each User ID given roles relevant to the duties they need to perform on the system.
Before requesting access to Gemini, please read the Gemini User Role Descriptions information. Once you have decided on the correct user roles, your Local Security Officer (LSO) can arrange Gemini access for you. Contact them and ask them to return the Gemini Access Form, requesting the:
- creation of your user IDs
- required roles for your ID
Your LSO is responsible for all account administration, including:
- creations and deletions
- permissions and roles
- password resets
If you need to know who your LSO is, our Service Desk can help:
Gemini Help Button
A Help Button has been introduced within Gemini and the Citrix page.
The button lets Users view:
- Frequently Asked Questions about Gemini processes
- Basic information about the functionality in Gemini
What Gemini Does
To put, or flow, gas into the National Transmission System (NTS), Users need to get System Entry Capacity. Gemini is used for this process, with the following functions:
- GB/EU Entry Trading
- GB/EU Entry Capacity Transfers
- GB/EU Entry Capacity Auctions
- GB/EU Invoicing
- GB/EU Entry Nominations
- GB/EU Entry Allocations
What Gemini Exit Does
To take, or flow, gas out of the NTS, Users need to get NTS Exit Flat Capacity. Gemini Exit is used for this process, with the following functions:
- GB/EU Exit Capacity Trading
- GB/EU Exit Capacity Transfers
- GB/EU Exit Capacity Auctions
- GB/EU Invoicing
Gemini invoicing file formats are available from the UK Link Documentation secure SharePoint.
The maintenance window for Gemini runs every day.
From Monday to Saturday, the service will be unavailable from 3:15am – 4:15am.
On Sundays, the service will be down for maintenance from 3:00am – 5:00am.
If you are trying to access Gemini outside of the maintenance windows and are unsuccessful, please raise a ticket with the Xoserve Service Desk by emailing firstname.lastname@example.org.
View all of the Gemini event information in our calendar by clicking here.
View maintenance and system outage information for all our systems.
Frequently Asked Questions
Thank you for your feedback