Miketew wrote:

You are of course dead right Andy, the only other thing is that all
supplimentary equipotential bonding must be done in 6mmsq cable minimum

Wrong. 4mm^2 covers most requirements in bathrooms, and smaller sizes
can be used if mechanical protection is provided. Larger sizes are only
required if you're bonding two CPCs of =6mm^2, or one CPC of =10mm^2
to extraneous-conductive-parts. Table 10B in the OSG provides a useful
summary.

finally unless you are a qualified electrician and have registered and
been asessed under part P building regs you are breaking the law doing
this anyway as bathrooms are clearly defined as risk areas.

Wrong again, although a building notice is required for work in a
'special location' (which does include a bathroom, within the Zones).

--
Andy