Future In NUMBER@1 , phase one of the East London Line extension -LRB- part of LOCATION@1 Overground -RRB- will be extended from LOCATION@2 to LOCATION@3 and LOCATION@4 station .

Future In NUMBER@2 Highbury & LOCATION@4 will become the new northern terminus of phase one of the ORGANIZATION@1 extension , which will be operated as part of LOCATION@1 Overground .
