Thanks for that. The 9 position switch that is in the cooker is the A03409 that is shown in your second link and I would have expected that in cookers after 2004 so that is what confused me. The fact that some of the positions do not work is a concern and the green light near this switch is missing altogether. I am going to reterminate all the dodgy cables and see if the wiring can match the diagrams I have. I think I will give the complete underside of the top a thorough degrease as I perceive that the oily residues are a contributing factor to what ails it. Once done I can then test thoroughly and decide if to use the A03408 or A03409 switch. If I keep to the numbering that I see I can at least check it with the diagrams that I do have. I can then also look to put back the green light.
Thanks for your help.