Dear North East Metro Operations Limited,

I understand that all Tyne and Wear Metro trains operate with 3 digit diagram numbers, which become headcodes on the Sunderland route on Network Rail infrastructure.

My request is for an explanation of how these diagram numbers are assigned, for instance whether and how they relate to particular routes and purposes (including non passenger workings if applicable).

Yours faithfully,

Andy Soames

Freedom Info, North East Metro Operations Limited

Dear Andy,

Thank you for the email in which you have sought information under the Freedom of Information Act. I will provide a full response within the statutory timescales of 20 working days.

Regards
Michael

Michael Hunt
Executive and Business Manager

Until further notice I can be reached by email only

show quoted sections

Freedom Info, North East Metro Operations Limited

Dear Andy,

Thank you for the email in which you requested information under the Freedom of Information Act. In particular you sought an explanation of how diagram numbers of Metro trains are assigned.

I can information that trains are usually numbered thus – these are known as Train Running Numbers (TRNs) or headcodes:

101 to 112 = AIRPORT TO SOUTH HYLTON
113 to 120 = AVAILABLE NOT USED
121 to 136 = ST. JAMES TO SOUTH SHIELDS
137 to 139 = AVAILABLE NOT USED
141 to 149 = AM PEAK
141 = SAFC FOOTBALL SPECIALS unless on a Weekday use 171
151 to 159 = PM PEAK
160 = AVAILABLE NOT USED
161 to 170 = DRIVER TRAINING, PRIVATE HIRE, ADVERTISING TRAINS
171 to 180 = NUFC FOOTBALL SPECIALS, BRAKE TEST TRAINS
181 to 189 = SPECIAL TEST TRAINS, ECS TO HYLTON ST AND WORKS TRAINS
190 to 199 = TO BE USED TO RETRIEVE FAILED TRAINS FROM NETWORK RAIL INFRASTRUCTURE

On Metro, trains retain the same number all day, including for out of service movements. This sets Nexus apart from other TOCs where each separate journey for a train has a different number.
On Network Rail infrastructure, train numbers are converted to a 4-digit Network Rail headcode. The last two digits are retained, the first digit becomes a 2 (in service) or 5 (out of service) and an “I” is inserted after the first digit. For example:
• 101 would become 2I01.
• A weekday SAFC football special 171 would become 2I71 in service and 5I71 out of service.

I hope this helps to explain the diagram numbers.

Regards
Michael

Michael Hunt
Executive and Business Manager

Until further notice I can be reached by email only

show quoted sections

Dear Freedom Info,

Thanks very much for your perfect and prompt reply Michael! Absolutely spot on.

Yours sincerely,

Andy Soames

Freedom Info, North East Metro Operations Limited

No problem, glad we could help.

Michael Hunt
Executive and Business Manager

Until further notice I can be reached by email only

show quoted sections