The Wanstead And Woodford Recorder - a new freebie -
has a report about reducing noise on one section of the
Central Line.

"An innovative new technique will be used to reduce noise
from the Tube between Woodford and South Woodford,
the Mayor of London has stated.

Sadiq Khan explained that a system of "rail damping" will
quieten the wheel when it rubs against the track on what
is known as one of the loudest sections of the Central Line."

The report quotes local politicians saying reducing overcrowding
on the Central Line is far more important, with which I agree.