IMPORTANT INFORMATION
The transition of Signalling Maintenance Testing Handbook Competences to Sentinel
We are pleased to confirm that the SMTH Authority to Work (ATW) will formally transition into Sentinel on Tuesday 10th March 2026 for the following competences:
- SIG MAINT TEST SMTH.a – Core Skills
- SIG MAINT TEST SMTH.b – Aspect Testing
- SIG MAINT TEST SMTH.c – Points Testing
- SIG MAINT TEST SMTH.d – Cable Function Testing
- SIG MAINT TEST SMTH.f – Diversion of a Circuit
SMTH competences not detailed above are unaffected by this transition.
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