London Overground East London Line is a bit of a different one.
9A** Highbury - Crystal Palace
9B** Crystal Palace - Highbury
9C** Dalston Junction - West Croydon
9D** West Croydon - Dalston Junction
9E** Dalston - New Cross
9F** New Cross - Dalston
9N** Highbury - Clapham Junction
9M** Clapham Junction - Highbury
9G** Usually last few trains in service from Highbury - New Cross Gate
5*** ECS moves north of New Cross Gate (core route)
3*** ECS moves south of New Cross Gate
9A** Highbury - Crystal Palace
9B** Crystal Palace - Highbury
9C** Dalston Junction - West Croydon
9D** West Croydon - Dalston Junction
9E** Dalston - New Cross
9F** New Cross - Dalston
9N** Highbury - Clapham Junction
9M** Clapham Junction - Highbury
9G** Usually last few trains in service from Highbury - New Cross Gate
5*** ECS moves north of New Cross Gate (core route)
3*** ECS moves south of New Cross Gate