I have run oven tests and grill tests as follows:
Oven ( done twice)-
Tried 150 degrees: then 180 degrees: then 220 degrees. All 3 temperatures done twice for 15 - 20 minute period of time i.e. repeated.
The same each time as follows:
Both side elements appear to be fine - no sign of blowing etc. Both sides/elements do not glow red. This is irrespective of temperature reached and checked twice. However, they are hot both sides and giving out heat on both sides for all 3 temperatures and which increases when 220 degrees.
Then I tested the grill - same principle of twice repeated test. The same result both times.
Both elements appear to be fine. They both glow red when turned on.
The Single grill knob set to number 2 blows the RCD after 2 minutes so could not test at 3 or on High.
The Twin grill knob set to High blows the RCD after 2 minutes. However, when the Twin grill knob is set to either 2 or 3 for 15 - 20 minutes, each time, it does not blow the RCD on either setting. So some grill capability on 2 and 3 settings for the Twin knob.
Please advise what I need to do and would be so grateful for parts numbers for oven and grill.
It was also easy to remove and replace the oven sides - brilliant - not done that before !!
Thank you so much for all your help - wonderful. So easy to follow.