I am shortly going to be fitting a new kitchen. The "old" kitchen had a cooker with combined oven,grill & hob connected to a 45A cooker control unit with combined socket. Would it be better to connect the hob to the existing CCU and connect the double oven (which also as a grill to a seperate CCU). I have read that the CCU for the double oven can replace an existing 13A socket in the room , is this correct?