Signalling Principles Handbook: Track Circuit Block (Former Railway Group Standard GK/RT0041 Issue 1)
Document status: [ Withdrawn ]
Signalling Principles Handbook: Absolute Block (Former Railway Group Standard GK/RT0042 - Issue 1)
Document status: [ Withdrawn ]
Signalling Principles Handbook: Single Line Control (Former Railway Group Standard GK/RT0051 - Issue 1)
Document status: [ Withdrawn ]
Signalling Principles Handbook: Radio Electronic Token Block (Former Railway Group Standard GK/RT0054)
Document status: [ Active ]
Signalling Principles Handbook: Interlocking Principles (Former Railway Group Standard GK/RT0060)
Document status: [ Revised ]
Signalling Principles Handbook: Interlocking Principles (Former Railway Group Standard GK/RT0060) - NR/L2/SIG/30009/GKRT0060
Document status: [ Withdrawn ]
Signalling Principles Handbook: Shunters Releases, Ground Frames, Switch Panels and Gate Boxes (Former Railway Group Standard GK/RT0061 - Issue 2)
Document status: [ Withdrawn ]
Signalling Principles Handbook: Approach Locking and Train Operated Route Release (Former Railway Group Standard GK/RT0063 – Issue 1)
Document status: [ Withdrawn ]
Signalling Principles Handbook: Provision of Overlaps, Flank Protection and Trapping (Former Railway Group Standard GK/RT0064)
Document status: [ Withdrawn ]
Signalling Principles Handbook: Command and Control System; Control System and Interlocking Platforms - Train Protection and Automatic Warning Systems
Document status: [ Revised ]
