I know it is not recommended, but I put my hob in with a cooker flexible,
that was twenty five years ago and it is still ok. After all if it is ok
for a cooker, why not a hob?

I thought it was allowed, provided that it could hang free in a U bend,
connected upwards to the bayonet. As they are normally installed over ovens,
this isn't practical, as they would rest on the hot top surface of the oven.
I may be completely wrong, however.

Christian.