Further on with this now, and a refinement brings a quandary :-

Mains is spurred from an existing double socket, through a new 3A fcu, 1.5mm T&E cable in conduit to switch position.

It has been decreed that two switches controlling two independent sets of lights are required...

So what's best practice to cable this lot up?

I can imagine a 6way junction box, with mains in, two switch wires, and two cables out 1 to each set of lights, like a loopin lighting setup;
Or
A deep backbox behind the double switch with choc blok connectors doing the job of the junction box. Mains in, 2 switched feeds out to the lights...

Last one sounds neater but less "proper"...

What would you do and why?

TIA

Jim K