John White wrote:

You cannot avoid the requirements of "Part P" by just plugging in the
circuit or appliance.

In reality you can. Buried swa + CU + fixed feed = part p applies,
whereas
plugin extension lead = part p doesnt apply.

So long as this is used by the householder in their own home, plugging
in an extension lead, and far worse things, are all quite legal. There
is no requirement for any rcd. A permanent installation would be a
different matter.

Best practice is also a different thing again.


NT