Streets look better with trees. Sure, some might drop sap on your motor, but there's no denying that a road framed by leafy greens is much nicer on the eyes (not to mention better for the lungs). One of London's poshest retail destinations is the latest part of the capital to benefit from a green makeover. Sloane Street, a one-kilometre stretch which runs between Knightsbridge and Sloane Square, has been transformed with new trees, plant beds and wider pavements.