Route 557
Route: Bolton area
Operators
| Operator | Start date | End date | Notes |
|---|---|---|---|
| Blue Bus | 20/07/2004 | 29/07/2006 | |
| Arriva Liverpool | 31/07/2005 | 29/07/2006 | Dates to be confirmed |
| Ashall's Coaches | 31/07/2006 | 28/10/2006 | |
| Arriva Liverpool | 30/10/2006 | 18/04/2009 | |
| Tyrer Bus | 20/04/2009 | 01/06/2009 | Mondays to Saturdays |
| South Lancs Travel | 16/04/2012 | 14/01/2017 | Continues as Diamond Bus North West |
| Diamond Bus NW | 16/01/2017 | 22/04/2017 | Continuation from Green Triangle Buses (formerly trading as South Lancs Travel) |
| Cumfybus | 24/04/2017 | 27/04/2019 | |
| Tyrers | 29/04/2019 | 09/04/2021 | |
| Vision Bus | 12/04/2021 | 22/09/2023 | |
| Diamond Bus NW | 25/09/2023 | Bee Network franchise operator |