RATP Dev Transit London
| Industry | Transport |
|---|---|
| Founded | 11 December 2021 |
| Defunct | 28 February 2025 |
| Fate | Sold to First Bus London |
| Headquarters | Stamford Brook garage, , England |
| Owner | RATP Dev |
Number of employees | 3,700 (2024) |
| Subsidiaries | London Sovereign London Transit London United |
| Website | www |
RATP Dev Transit London was a bus operator owned by RATP Dev in London, England. It owned London Sovereign, London United and London Transit. It commenced on 11 December 2021 as a joint venture between RATP Dev and Kelsian Group. In September 2023, it became a wholly owned RATP Dev subsidiary. In December 2024, RATP Dev agreed terms with FirstGroup to sell the business with First Bus London taking over in February 2025.