In message , at 07:36:48 on Sat, 29 Sep
2012, Roland Perry remarked:
The problem at the KWS end seems to have been Swan Lane, which is just
north of the river. The tunnels were arranged vertically there (with
the northbound tunnel above), but then spread out horizontally under
the curve of Arthur St West so that both lines entered the station (one
platform) at the same level.

Under King William Street it was left-hand running

Sorry, I meant Arthur St West, for a second time.
--
Roland Perry