On Saturday, 19 January 2019 12:41:28 UTC, Harry Bloomfield wrote:
sm_jamieson formulated the question :
Just a thought. Its nice to have light in the CU cupboard !
What is the simplest acceptable way to wire (surface-wired) a light so it can
be on when the CU main switch is off ?
Perhaps without fitting a whole second mini-CU, henley blocks, etc.
e.g. via a fused switch directly from the main incomers.

There is no other way I can think of. Unless you think in terms of an
emergency light, or some sort of battery powered light.

Thanks all, yes an emergency light is the best idea of course, and if the power is lost competely it comes on (to state the obvious).