| Overview | |
|---|---|
| Franchise(s) | North London Railways 2 March 1997 – 10 November 2007 |
| Main region(s) | Greater London |
| Other region(s) |
Bedfordshire, Buckinghamshire, Hertfordshire, Northamptonshire |
| Fleet size | 67 |
| Stations called at | 88 |
| National Rail abbreviation | SS |
| Parent company | National Express Group |