In message , Jason Hobbs
King writes

This got me reading the TfL Conditions of Carrirage and I noticed -

http://www.tfl.gov.uk/buses/nftt_bus_saver.shtml#2
"It is a book of 6 single bus tickets, which can be bought in advance,
for travel on buses, including N-prefixed Night buses, across the
entire London bus network."

But at http://tube.tfl.gov.uk/content/about/COC.pdf at page 10 -
"Ticket Bus single Saver 6
You cannot use it on N-prefixed Night Buses or special bus services."

That document is dated 2000. Things have changed since then.

Which is right?

The first source you quoted. Savers have been valid on night buses ever
since night-bus fares were made the same as their day-time equivalents.
All the night-bus maps make this clear:

Night bus fares are now the same as day fares
* Adult Savers are valid on Night buses and work
out at 65p per journey

--
Paul Terry