After many delays and much uncertainty the new entrance to Bank Station built as part of the new Bloomberg office complex has opened today. This gives new escalator and lift access to the Waterloo and City Line primarily. AIUI the new escalators emerge near the end of the one of the W&C Line tunnels and where the long link corridor to the Northern and Central Lines starts from the W&C gateline area.
Ianvisits has been already. An article is on his website.