On 27 Oct, 17:02, MIG wrote:

Not at deep level, for obvious reasons.

There's no obvious reason why there shouldn't be any at deep level,
though to the best of my knowledge none exist, at least for public
use; are there any for staff?

Facilities were provided in the deep level shelter tunnels, which are
pretty similar to tube station tunnels, and I believe that remains of
sewage ejectors, used to lift the waste to the level of the sewers,
still exist at some of these.