Thank you all!
I'll test it tonight. The top was in the house when we bought it 20 years ago, so I don't know exactly what type it is. I mentioned induction (which I don't understand but realise it deals with "fields" ) to SWMBO and got told no, it is a glass one.... I know better than to argue
Now the nasty electrical burn smell has gone and the heart rate is back to normal, I'll check it out and if all seems normal, I'll watch it for a couple of cooks and see how we go.
I just operate on the principal of "what you don't know you don't know is what will kill you" with electricity.
Thanks again all!!!