In article .com,
John B wrote:

Agreed that Finsbury Park, Oxford Circus, Euston and Stockwell are all
both good and clever.

But why didn't they go for x-platform at Green Park and Warren
Street...?

Or Kings Cross. It's a particular bugbear of mine that there's really
no good way for someone arriving at Kings Cross or St Pancras to get
onto the Charing Cross Branch. Surely it wouldn't have been too hard
to arrange things so that the Victoria Line interchanged with the Bank
branch at KX, and the CX branch at Euston? Having cross platform
interchange at Euston with the Bank branch seems a whole lot less
useful than what could have been done.