Update: I tested the fan, it didn't work. Fitted a new gold resistor (bought from Jules years ago). Tested again and it was fine :-)
I've swapped the fan over and put everything back together. However, I've got to the stage where I need to re-fit the bumper and I have these two torx bolts left. Does anyone know where they're from? It must be the sun - I can't remember where they came from.