Everything you need for UK gas scheduling

CodeRunner is a gas balancing and portfolio management system for the UK gas system incorporating a user-friendly front end to Gemini.

CodeRunner Release Notes

25+ years in the making

CodeRunner was originally developed to support GMSL’s in-house operations starting in late 1996. Development and sales have been continuous from this time and the system now supports over 40 shippers, managing every aspect of UK gas operations.

Our clients value the fact that GMSL understands the pressures of 24/7 operations – CodeRunner is designed with this experience at the forefront.

Product Scope

Using CodeRunner the shipper can manage all aspects of a gas portfolio:

  • Gas trades (at NBP or at the Beach)
  • Long term contracts (sale and purchase, NBP or Beach)
  • Storage contracts
  • ICE Endex trades
  • Capacity bookings
  • Gemini nominations
  • Gemini allocations
  • Post-day CVA processes

The system is used by GMSL to support all of its UK 24hr shipper operations and CodeRunner is licenced to a number of external companies.


CodeRunner includes interfaces to:

  • National Gas Gemini system
  • National Gas XFTM Bulk Transfer
  • CVA Claim3 system
  • External trading systems

Further Information

For more information about CodeRunner please contact us

Release Notes

For the latest CodeRunner Release Notes please see here.