Well, I never did!. After everything we've been saying it seems that NICEIC allows the green/yellow conductor in 3-core flex to be used as a live conductor (ie switched live to a timed fan).
Read, 514.4.2 and weep
http://www.voltimum.co.uk/sites/www...ic_sleevingearthcore_earth_as_a_conductor.pdf
Read, 514.4.2 and weep
http://www.voltimum.co.uk/sites/www...ic_sleevingearthcore_earth_as_a_conductor.pdf