On 31 Jan, 14:14, Roland Perry wrote:
Wouldn't it have been better to just re-use the original northern line
lifts, which come out right next to the current ticket hall?
Maybe that's what they are doing[1]
The tunnel they are closing is closer to the former picadilly line
lift shaft. The tunnel to be closed is near the east end of the
northern line platforms, approximately where the hoarding has been
added at the bottom of the escalators (which probably explains the
hoarding).

The old northern line lifts were further along the platforms, in the
middle where the cross passages are.

[1] Albeit the entrance to the new lift is presumably going to be
"airside", which may not be the case for this old lift you talk about.
It depends which ticket hall you are thinking of. The new lift is
airside of the "tube ticket hall", but the old northern line lifts are
not. However, the old lifts are definitely airside from the point of
view of the "northern ticket hall".