Chris Green wrote:
Is there any sensible way to tighten SWA gland earthing ring nuts?
Even on the smallest size (20mm hole) the gland nut is 24mm or 25mm
and I've never managed to find a spanner of that size that has any
chance of getting at the nut.

You can't tighten from the outside because that would twist the wire -
or is the correct technique to tighten the gland in the box before
tightening the cone nut (if so the DIYFAQ needs to be changed or added
to to indicate this is how to do it)?

I came across this video yesterday with a different technique using a pair
of adjustable spanners - not sure if it answers the question as I've not
worked with SWA:

https://youtu.be/KJfbhnUKKUE?t=927

Theo