Cooker runs from circuit breaker on new curcuit board. The power is definitely running through the breaker as the socket part of the 45a CCU is still working. As far as I'm aware the CCU itself does not hold a fuse and therefore this could not have blown. Thanks for reply, but still not working!
I am currently renovating my kitchen and in the process of this a large amount of dust/dirt managed to get inside my cooker switch. When I threw the swich later in the day the bulb for the cooker switch flashed on and off and the went off, when the bulb went off all power ceased to the cooker...