Joe wrote to uk.transport.london on Sat, 18 Sep 2004:

After seeing 4 (yes, 4) 188 buses in a row outside Surrey Quays today, I
was wondering, what is the biggest number of buses anyone has ever
seen in a row?

Ten or eleven going up and/or down Brixton Hill - I remember counting.
They were not all the same route, though.
--
"Mrs Redboots"
http://www.amsmyth.demon.co.uk/
Website updated 11 September 2004