Also be careful which spanner you buy.
The proper "box" spanner, which has a bar go through it to lever with will not fit once the cable is fitted the the element- & you REALY want to fit the cable first as it'll be too tricky to do it "in-situ".
You want the one that looks like a big spanner with a handle on it & you should then be able to slide the cable through it.
I used a big pair of stilsons instead, I have the "box" spanner so I speak from experience!
