Orient 's only London derby in the league is with Barnet .
Orient will do battle at the Hive on October 1 before home games against Portsmouth and Luton Town on October 8 and 15 .
Orient 's only London derby in the league is with Barnet and they will do battle at the Hive on October 1 before home games against Portsmouth and Luton Town on October 8 and 15 .