Kammala jumla mai zuwa: A ranar 12 ga Fabrairun 2009, Magajin Garin Boris Johnson da Sakataren Sufuri Geoff Hoon sun ba da sanarwar fam miliyan 75 don tallafawa fadada kudancin cibiyar sadarwar Overground tsakanin Surrey Quays da Clapham Junction a matsayin wani ɓangare na fadada layin Gabashin London, ƙirƙirar haɗin ƙarshe na layin dogo na duniya don London da za a kammala a lokacin wasannin Olympics na 2012. Duk da haka, lokacin da TfL ya wallafa a watan Afrilu na 2011 ya bayyana cewa layin ba zai bude ba har zuwa karshen 2012, bayan da wasannin Olympics na Summer da kuma
Gasar wasannin motsa jiki.