David Cantrell wrote to uk.transport.london on Sat, 4 Dec 2004:

On Tue, 30 Nov 2004 23:12:29 +1030, (Aidan Stanger)
said:

I thought the reason for cutting it back was that the trains were
running empty.

Which is presumably because there is a cheaper alternative, which
admittedly stops at least twice en route but, unless you are going to be
travelling in the wee small hours, why pay more?
--
"Mrs Redboots"
http://www.amsmyth.demon.co.uk/
Website updated 28 November 2004