Ok I've completed the oil and filter change, and have been going over the car in preparations for the track day.

I found the cooling fan wasn't operating, and traced the fault to a broken wire in the loom, and repaired it. However, I found that in operation, the wiring got very hot, I'm guessing that this is because the old BMW fan is a little stuck, so I've ordered a new fan.

I also found that the left indicator isn't working, I'm not sure why yet, but I'm hoping it's not the relay, as a replacement may be quite expensive.

I still need to find a permanent fix for the brake light switch, and sort the loose bonnet out.