Cooker and microwave on seperate circuits then your arse is covered. Plate warmer on with kitchen sockets protected by switched fused spur. Hob obviously on its own too.
I got caught out with one of those microwaves on a job in the past. You cannot have them on a 13 amp plug they need there own 20 amp circuit on a 20 amp switch. I have just done a kitchen refit. That had two ovens a warmer drawer and a fridge in one corner. These were put on a four way grid switch each with its own circuit. I did it this way as it was a very short run. If they are spending 20k I would want to get the electrics right.