On Sun, 17 Feb 2019 08:55:53 -0800, spuorgelgoog wrote:

6A 30mA RCBO Smoke Alarms

I would always put them on a lights circuit, then you'll notice if that
circuit trips fairly quickly (and get it fixed). Similarly for a
freezer.

Hmm... yes - that sounds a good idea. The smoke alarms have battery
backup but of course that would only become apparent after some time, and
the missing power LED would unlikely be noticed.

80A 30mA RCD covering:
32A Oven 32A Hob

Will they not go on one circuit?

I did wonder that. There's a new kitchen going in with a new - as yet
unspecified - electric oven and induction hob (to replace a gas hob). To
maximise choice, both now and in the future, I was planning on running
two circuits, but perhaps that's overkill?