The West London line passes beneath the Earls Court Exhibition Centre along a complex intersection of track which crosses over the subsurface junction of three District line branches. The planned redevelopment of the site by Capital & Counties Properties envisages demolishing the Exhibition Centre to make way for retail and housing; as part of these plans, the West London line is to be enclosed by a concrete box. Commentators have noted that the proposals make no allowance for any future quadrupling of the track to increase capacity on the line.