Signal box bell codes (2024)

1 Call attention 1-1 Answer telephone withdrawn 2007 1-1-6 Police assistance urgently required 1-2 Signaller required on telephone added 2007 1-2-1 Train approaching 1-2-2 Line blockage completed added 2015 1-2-6 Opposite line, or an adjacent line used in the same or opposite direction, to be blocked for the passage of train conveying out-of-gauge load 1-3-1 Is line clear for Class 3 train? 1-4 Is line clear for Class 9 passenger (Class 373 train)? 'or other passenger train if specially authorised' added 2012 1-4-1 Is line clear for Class 9 empty coaching stock (Class 373 train)? 2 Train entering section 2-1 Train out of section, or obstruction removed reference to 'obstruction removed' deleted 2007 2-1-2 Obstruction removed added 2007 2-1-3 Locomotive arrived 2-1-6 Train that carries speed or route restrictions only and which can pass trains signalled 2-6-1 or 2-6-2 on the opposite or an adjacent line replaced 2012 2-1-6 Train with speed or route restrictions only added 2012 2-2 Locomotive assisting in rear of train withdrawn December 2007 2-2-1 Is line clear for Class 5 train? 2-2-2 Block line for protection purposes added 2015 2-2-3 Is line clear for train requiring to stop in section? withdrawn December 2007 2-3 Is line clear for Class 0 locomotive or locomotives? 2-3-3 Working in wrong direction 2-4 Blocking back inside home signal 2-5 Train withdrawn 2-5 Token replaced 2-5-5 Train or vehicles proceeding without authority in the wrong direction 2-5-5 Train or vehicles proceeding without authority 2-6-1 Train that can pass trains signalled 2-6-1 or 2-6-2 on the opposite or adjacent line which will be signalled 2-6-2 or 2-6-3 at some part of its journey replaced 2012 2-6-1 Train which will be signalled 2-6-2 or 2-6-3 for part of its journey added 2012, replaced 2017 2-6-1 Train that can pass trains signalled 2-6-2 or 2-6-3 on an opposite or adjacent line which will be signalled 2-6-2 or 2-6-3 for part of its journey added 2017, replaced 2018 2-6-1 Train that can pass trains signalled 2-6-1 or 2-6-2 on an opposite or adjacent line which will be signalled 2-6-2 or 2-6-3 for part of its journey added 2018, replaced 2018 2-6-1 Train that can pass trains signalled 2-6-1 or 2-6-2 on an opposite or adjacent line but which will be signalled 2-6-2 or 2-6-3 for part of its journey added 2018 2-6-2 Train that cannot be allowed to pass trains signalled 2-6-2 or 2-6-3, on an opposite or adjacent line 2-6-3 Train requiring an opposite or adjacent line to be blocked 2-8 Home signal defective withdrawn 2014 3-1 Is line clear for Class 2 train? 3-1-1 Is line clear for Class 4 train? 3-2 Is line clear for Class 8 train? 3-2-3 Train drawn back clear of section 3-3 Blocking back outside home signal 3-3 Blocking back withdrawn December 2010 3-3-2 Shunting into forward section 3-3-4 Train or vehicles at a stand withdrawn 2009 3-3-5 Line now clear in accordance with regulation 3.4 for train to approach replaced 2012 3-3-5 Line now clear to clearing point added 2012 3-5 Cancelling 3-5 Cancel last description sent withdrawn December 2007 3-5-5 Restricted acceptance 4 Is line clear for Class 1 train? 4-1 Is line clear for Class 7 train? 4-4-4-4 Transference of tokens withdrawn 2007 4-5 or 9 Train passed without tail lamp 4-5-5 Train or vehicles proceeding without authority in the right direction 5 Is line clear for Class 6 train? 5-2 Train clear of section 5-2 Release token 5-3 Train incorrectly described 5-5-5 Opening of signal box 5-5-7 Closing of signal box where section signal is locked by the block 6 Obstruction danger 6 Emergency alarm 6-2 Train an unusually long time in section withdrawn December 2007 7 Stop and examine train 7-5-5 Closing of signal box 8 Shunt withdrawn 8-2 Distant signal defective withdrawn 2014 8-4 AHB level crossing - trains cautioned. Local control being taken (where communication is not available between adjacent signal boxes) withdrawn December 2007 9 or 4-5 Train passed without tail lamp 16 Testing equipment