Hi. Thanks for your replies.

The RCD is 30mA. The guy who came out said really cookers shouldn't be covered by the RCD as this value can be too low, and can be tripped too easily. Is this true?

The RCD has tripped when turning on the cooker, and on one occasion, its ventilation fan above it. On the day when the RCD repeatedly tripped, it was by turning on the oven; it was ok at temperatures below 100 degrees, but as soon as I turned the knob beyond that, the RCD tripped.

The cooker, hob, and ventilation fan, are all on the same wiring; switching off the cooker fuse in the fuse box stopped all three from working. That's the only test the guy did when he came; he didn't look at the cooker or do any tests on it.

He said it was safe to move the cooker outside of the scope of the RCD because the wiring was still covered by a fuse in the kitchen above the cooker, and the main switch in the fuse box.

I guess what I really want to know, is, is it safe to carry on using the cooker like he said, or should I stop now and get out somebody to look at the applicance. It has worked fine since, but of course, it is no longer able to trip the RCD.

Thanks