Would a Victoria line extension into South London along with the

London Underground: All the symbols on the new Tube map and what they mean - MyLondon

Transformation works begin on Victoria Line crossover

Why are there so few tube lines in south London? - City Monitor

Better Connected South London : r/LondonUnderground

The best and worst London Underground lines (according to science)

11 London Underground facts you won't know about the Victoria line - MyLondon

Victoria line - Wikipedia

The 50th anniversary of the Victoria line extension to Brixton

Victoria Line: London's Incredible Underground Line