GroupSave
Since 1999, many Train Operating Companies have elected to join this ATOC-administered scheme. Three or four adults can travel for the price of two on various off-peak ticket types; additionally, up to four accompanying children pay £1.00 each. The group must travel together at all times. No further discounts (using Railcards, for example) are available for any of the passengers.
Adult tickets are issued with the status code GPS-3 or GPS-4 as appropriate. Child tickets can be issued in a variety of ways - typically, ticket type CHILD FLAT FARE will be used, but occasionally the dedicated status code CHGPS will be used in conjunction with the same ticket type description as shown on the adults' tickets.
At first, the scheme applied only in the London and South East (former Network SouthEast) area; but from January 2006, it was extended to cover Train Operating Companies (TOCs) outside this area. In addition, some TOCs allow children to be "upgraded" to adults to benefit from GroupSave when two adults travel with a child.
The National Rail "GroupSave" sub-site describes the scheme in the London and South East (former Network SouthEast) area, where it duplicates the Network Railcard's function to some extent.
Read more about this topic: Concessionary Fares On The British Railway Network