"Boltar" wrote in message
...
What was the disused trackbed next to the central line between north
and east acton used for?


According to Joe Brown's London rail atlas, it was a main line built in 1917
from Viaduct Junction (where the H&C crosses the WLL) to Old Oak Lane Halt
[which closed to passengers in 1947], just north of the GWML.

The line was shared by the Central Line, newly extended from Wood Lane, from
1920 on, until 1938 when the route was quadrupled, giving the Central
dedicated tracks. The main line route was abandoned in 1964.

HTH Paul S