The way down is (unsurprisingly) the reverse of the way up, including a change of lifts mid-way down.
The lift lobby (shown above) is near the small gift shop mentioned yesterday. The windows have a sky motif stuck to the windows with views of London peaking through the image:
A really nice experience, although not helped by the weather. Friendly, informative staff who were happy to help and keen to engage with the customers. An unhurried experience.
My only doubt is value for money – nearly £25 per adult ticket might be a little rich for some people