On 2 Oct 2006 11:39:51 -0700, "Staffbull" wrote:

My first thought was to RCD everything apart from the lights, is this
sound?

Yes

the cooker and hob both have seperate radials as they are more
than 2m apart (as per regs).
What size MCB should serve the cooker & hob (seperateley) the CU came
with five 32's one 40 three 6's and one 16.

The MCB needs sizing in accordance with whatever size cable you are
protecting. Without these "unknowns" it's just a guessing exercise.

The guess could be 32A, 20A or 16A

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