How Bank-Monument works

Since I made my maps of Green Park and King's Cross St. Pancras I knew it was only a matter of time before I had a crack at Bank-Monument. And here's what I've come up with:

[ Update: Diagram of the current closures ]

There are several other maps available, but I wanted to do something a bit more detailed and geographically accurate that could be reconciled with the actual experience of traipsing through the tunnels.

Notes, disclaimers and things learnt during this exercise:

• This was made entirely by visual observation on a handful of short visits, with no accurate charts used save an aerial photo to get the general shape right. It's entirely possible it's hilariously wrong.
• The DLR really is slightly offset from the Northern Line and not quite parallel to it as shown. It's not me making my drawing easier.
• From shallowest to deepest the levels are: Ticket halls, District/Circle Line, Waterloo & City Line, upper interchange level, Central Line, lower interchange level, Northern Line and DLR.
• The route from end to end via the DLR rather than the Northern Line isn't actually much longer, it just involves a stupidly high number of bends and transitions.
• The Waterloo & City Line platforms have a tiny newsagent hidden in a cross passage. Is it the only deep[-ish] level station so blessed?
• The complex is so vast it has a whole other tube station within its thrall (Cannon Street).
• The lift access from street to the DLR requires using three separate lifts, two of which are in the peak hours only ticket hall.
• I have no idea what shape the Bank ticket hall really is.
• For extra anorak points I've included the platform numbers and escalator numbers - I've heard the guy on the tannoy (it appears the same one works there 24/7) use the latter to refer to the escalators under repair.

This long easter weekend, why not use the diagram to try to work out what on earth today's rambling TfL press release about escalator closures is trying to say.