It would been perhaps more helpful if you'd actually mentioned that the defender spotlight switch was an example of a different type of switch. I read it as you were showing an example of the switches you had previously been talking about. Here I was trying to figure out why on earth you're saying pin 5 is earth when it clearly wasn't.
Anyway. Now I'm all caught up, and if I have to wire another driving light switch at some stage, I'll certainly be looking for a cruise switch, bit less stuffing around to wire up than what I used (which I now remember was a rear fog switch with the latching mechanism from a rear wiper swapped in, effectively giving me the same as your defender spotlight switch).

