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| Date founded | 17 October 2021 |
| Still active | Yes |
| Number of stations managed |
164 |
| Fleet |
Class 375 Electrostar
Class 376 Electrostar Class 377 Electrostar Class 395 Javelin Class 465 Networker Class 466 Networker Class 707 City Beam |
| Regions |
Greater London
South East England |
| Parent company | DfT Operator |
| Reporting mark | SE |
| Predecessor | London & South Eastern Railway |
| Website | https://southeasternrailway.co.uk |