London Buses route SL4
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(Go-Ahead London)
| SL4 | |
|---|---|
_Go-Ahead_London_EBD69_LF74TWK_SL4_2025-06-13.jpg) | |
| Overview | |
| Operator | Blue Triangle (Go-Ahead London) |
| Garage | Henley Road |
| Vehicle | BYD BD11 |
| Peak vehicle requirement | 18 (April 2025) |
| Began service | 7 April 2025 |
| Route | |
| Start | Grove Park |
| Via | Lee Blackheath Leamouth Canary Wharf |
| End | Westferry Circus |
| Length | 7 miles (11 km) |
| Service | |
| Level | Daily |
| Frequency | Every 8-15 minutes |
| Journey time | 38-63 minutes |
| Operates | 05:00 until 01:34 |
London Buses route SL4 is a Transport for London contracted Superloop express bus route in London, England. Running between Grove Park and Westferry Circus, it is operated by Go-Ahead London subsidiary Blue Triangle.
The route is one of three bus routes to run through the Silvertown Tunnel, alongside route 129 and the Silvertown Tunnel cycle shuttle.[1]
The route was first proposed by Transport for London in November 2022 as part of the Silvertown Tunnel bus network.[2][3] At the time of the consultation, the route was proposed to be numbered X239.[4]
In March 2023, it was confirmed that the route would be introduced as planned and would also be included as part of the then proposed Superloop express bus network.[5] In October 2023, it was confirmed that the route would be introduced using route number SL4.[6]
In 2023, the contract to operate the service was awarded to Blue Triangle, a subsidiary of Go-Ahead London.[7][8]
Route SL4 was introduced on 7 April 2025, the same day as the opening of the Silvertown Tunnel.[9]
Current route
Route SL4 operates via these primary locations:[10]
