Where is Bank station located for the W&C? Is it next to Monument\Cannon St\Mansion House?
Both the Travelator and the platforms themselves lie under Queen Victoria Street, and extend about two-thirds of the way towards Mansion House station. Beyond MH the line runs, I believe, directly under the District Line, which also follows Queen Vic St towards Blackfriars, but they follow diferent routes east of MH - the District follows Cannon Street as far as the Monument, and then Eastcheap.
The only entrances to the line are from the booking hall under the Bank road junction*, and from the connecting passage between the Central and Northern Lines
*Junction of Poultry, Queen Vic Street, Walbook, King William Street, Lombard Street, Cornhill, Threadneedle Street, and Princes Street, and once the "hub" of the British road numbering system (meeting point of the A40, A3211, A3, B100, A10, A11, and A501)