Right now all those staff are in central London, not a 15-30[1] minute tube trip away from it. But hey, on the plus side, it's the famously-reliable southern half of the Northern Line. And when you get there it definitely won't be wall-to-wall chinless posh kids.
Yuck.
[1] Fifteen being the minimum time it could possibly take door-to-door to Tottenham Court Road tube, assuming no waiting of any kind en route)
I'd guess the staff work in Central London, but don't necessarily live there.
If some percentage move closer to the offices, that might not be a bad plan for them - although not so good for those further north.
The Northern Line is the reason I not only left London, but vowed never to have another job with a daily commute. So I certainly wouldn't wish it on anyone.
They're splitting the charing cross branch to run to Battersea Power station, while the bank branch will run to Morden. Kind of how it currently works (Charing Cross trains almost always start at Kennington), so can't see it decreasing reliability. https://tfl.gov.uk/travel-information/improvements-and-proje...
Yuck.
[1] Fifteen being the minimum time it could possibly take door-to-door to Tottenham Court Road tube, assuming no waiting of any kind en route)