The model Number is SI11TCLS. An image can be found here: https://www.reevoo.com/p/britannia-si11tcls#info
Having removed the top I can see very slight charring to one of the spade connectors on the 9 way control switch but having examined it carefully I don’t think this is part of the problem as it does not seem to affect a contact that is actuated when the top element is in use. Does this range have a central PCB or does the control switch and thermostat do it all?
Thanks