This is now silver squid

via StreetComplete 51.0

Attached photo(s):
https://westnordost.de/p/133065.jpg

New blue plaque?

Survey buildings here -- aerial view suggests connecting structures?

Also known as Watts’ Folly

In context of overlay "Addresses" – The Emporium of Loveliness (Charity Store) – way/285586201 via StreetComplete 56.1:

this shop is closed down and is now to let

Check buildings on Sion Place - might help get proper numbering on Sion Hill?

Check housenumbering on Sion Hill and housenames - also traced buildings.

What's happened to Hotwell road here? Looks like it's been dragged out of alignment, but at least it's not connected to the bridge.

Check if/when this reopens after 2020-08

the Bristol harbour railway has not been yet re-extended to a terminus at butterfly junction