There's actually a Hotwells connection here, fairly literally. This section of track, from Ashley Hill, Montpellier, Redland, this bit right here, then Clifton Down and through a tunnel under the Downs to Sneyd Park Junction and Sea Mills station, was built as the Bristol Port Railway extension line, the Clifton Extension Railway.

The original Bristol Port Railway and Pier connected Hotwells to a deep-water pier at Avonmouth (with a few stations along the way) avoiding the need to have ships wait for the right tide to come into Bristol to unload. We've previously been inside one of its tunnels.

It was also used by plenty of passengers—during WWI an extra platform was added in Hotwells to cope with the sheer number of Bristolians commuting to the docks and munitions factories daily as part of the war effort, as well as troop movements and incoming wounded on hospital trains.

Later on this isolated Bristol Port track needed to join up to the existing railway network to survive, so this extension line was added to connect it with Ashley Hill with help from the Great Western and Midland railways. Only later did the section to Hotwells fall into disuse and close in favour of the Portway road.

(Information mostly courtesy Colin Maggs' The Bristol Port Railway & Pier, Oakwood Press, 1975.)