On 2011\12\28 07:57, Charles Ellson wrote:
On Tue, 27 Dec 2011 15:58:17 -0800 (PST),
wrote:

Just seen a short clip on BBC 4 in the Dark series of archival clips
on Tuesday evening (23.55). Are 'fluffers' still employed to clean the
London Underground tracks? SB

They've got a giant yellow vacuum cleaner now :-
http://www.trainweb.org/districtdave...rs_trains.html

More stubborn debris presumably still gets human intervention but not
so often.

The change from friction brakes to rheostat / regenerative has reduced
the problem.