On Monday, 11 March 2019 18:20:25 UTC, F wrote:
I'm under pressure from Management to lower our shower rail by around
100mm but I really don't want to have to drill the tiles and to have to
fill the holes for the existing fitting (as shown at
https://www.screwfix.com/p/smith-loc...lished-chrome-
25mm-2-pack/9070v).
Is anyone aware of a fitting that would do the job?

Conduit box at existing location, drop down in 25mm conduit, conduit box with dome lid and horizontal rail into 25mm dome lid. If you can't get chrome conduit stuff build it and take it to a chromium-plater.

Owain