UB1UB2: Southall, West London on Instagram: "The fast 607 bus that travels between Uxbridge and White City has been renumbered as the SL8 as the first part of the planned Superloop that will be connecting Londoners! The new express SL8 launched today and sees the Superloop bus travelling across the Uxbridge Road just as the 607 does by covering four towns in the borough – Southall, Hanwell, Ealing and Acton. Click here to see the full route and timetable. Transport for London (TfL) says the time