The rule of thumb for cooker circuits is:
32A MCB or 30A fuse
6mm flat Twin+Earth cable
Applying diversity:
9400w
9400/230 = 41Amps maximum
Formula: 10A + 30% of rest + 5A for any socket outlet
10 + 0.3 * 31 + 5 = 24.3A
We only need to cater for 24.3Amps or only 19.3Amps...