The central element on the centre hob ring went.
The outer one was still OK.
I received an alledged compatible replacement which looked identical except the ring connections were on the left instead of the right.
They looked obvious so I connected up but neither of the rings worked.
There are 3 further connections on the block sticking out one white on the right to the lamp indicator, on the left one red and one two cable black.
ANy ideas?
I put the old one back to still have an outer ring that works.

JJ, October 2019