TfL and Motts discuss West London Orbital Overground line as feasibility stage completed 20 Nov, 2024 1 Comment 6,329 Views Transport for London (TfL), working with Mott MacDonald and the West London Alliance (WLA), has completed the feasibility design stage of the proposed £800-900M westward extension of the London Overground, known as the West London Orbital (WLO).