Transport for London (TfL) has launched the newest route of its Superloop scheme, rebranding the X140 between Harrow and Heathrow Central to become the SL9.

This is part of a wider plan to offer an "express" bus service in West London, with improvements including enhanced customer information, renamed stops and a move towards zero- emission routes.

The Superloop initiative also aims to encourage more Londoners to adopt a car-free lifestyle, particularly as the ultra-low emission zone (ULEZ) came into effect on Tuesday (August 29).

The Mayor of London, Sadiq Khan, has expressed his belief that the Superloop will revolutionize the way residents navigate the capital.

However, some Londoners have criticized the scheme for merely rebranding existing routes, arguing that more connections are needed.

In response, Tom Cunnington, the head of bus business development at TfL, emphasized that the Superloop is more than just a paint job for the transport system.

He told MyLondon: "That is something that was relatively straight forward to do, and this weekend we will finish that first phase of the first four routes becoming Superloop.

"It will take us a little bit longer to introduce the new routes, they've got to go through a slightly bigger process of consultation, and, of course, those additional routes are still subject to consultation, which we expect to come to a conclusion in the autumn, and we need to, of course, come to commercial agreements with the operators.

"So, those are going to take a little bit longer to come in place, but we're optimistic that we'll have those in place not too far away now, and make sure that we can create that Superloop before too long as well and give the real benefit of that to the wider range of customers."