Non National Rail Units
All rail vehicles operating on part of the National Rail network are required to be given TOPS codes. For this reason, both London Underground and Tyne & Wear Metro trains have their own TOPS classes:
| Class | Info | Image | Notes |
|---|---|---|---|
| Class 499 (II) | London Underground rolling stock | Classification given to all LU stock operating on NR, regardless of line | |
| Class 994 | Tyne & Wear Metro rolling stock |
Read more about this topic: List Of British Rail Electric Multiple Unit Classes
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