All change. Londoners have only really just become familiar with the Overground, the bright orange addition to their enviable public transport network. The uniformly branded Overground is a collection of surface rail services, adopted by the Transport for London (TfL) almost twenty years ago. The network has been steadily growing to now serve over one hundred locations, mainly in the suburbs. Now, like passengers at Clapham and Gospel Oak, it’s a case of all change. Again.