Fixed the car tonight then. The front wiring harness has more than just the fan and lights etc. The coil wire is there also and this was cut along with 6 other wires total. No coil wire, no spark, won't start. I spliced them all back together with the appropriate wire gauge and it starts right up. I zip tied the harness to the unibody so this won't happen again, I'm suspecting the harness wasn't zip tied out of the way before although there is an old tie on the unibody but it's broken so it could be broken because of old age or other reasons and it looks like this let the harness move in to the path of the alternator blades and that pulled it in to the belt and zappo. Hard to know whether the belt pulled the harness or vice versa though so it doesn't matter now one way or the other.
I just need to buy the alternator belt, fit it and it looks better than before. I wrapped the harness in electrical tape but I'm looking for something better, i.e. waterproof and more weather/wear/heat resistant to put over it.
Next track day is BIR with Donnybrooke again Sept 15th and then with PCA for 3 days at Sept 28th.