Mizter T wrote:
Obviously there was the 30's plan for the southern extension to
Camberwell, thwarted by the war - but were there ever any earlier plans
or intentions to take the line further south?

There appears to have been an Old Kent Road plan before it ended up at
Elephant:
http://en.wikipedia.org/wiki/Baker_S...terloo_Railway
and a variety of other 1920s proposals involving Camberwell and beyond:
http://en.wikipedia.org/wiki/Bakerloo_line_extension

Theo