The Medway Handyman wrote:

I've 'avoided' Part P on quite a few occassions when fitting new
security lights. I've done so by clearly saying that I can't run a
new circuit to the light, but I could run a cable & terminate it with
a 13 amp plug (suitably fused), which can be plugged into a nearby
switched socket outlet.

This does not get round Part P. The Approved Document is quite clear on
the point - see note (h) on page 9.

--
Andy