What in the world is wrong with my V12?

[Wiggles (Paul Wigton)]

And then there’s this recent addition to the conversation…

Running PERFECT then not

So I drove the Jag over to the Claremont in Berkeley yesterday and it ran amazing. Came out 90 mins later and realized I’d left the lights on but not a big worry as the battery is healthy and it was only 90 mins. Got in and tried to start her and she spun over quickly with no issue but acted like it had ZERO spark. Didn’t even pop once. I checked all the coil and distributor connections and all appeared fine. It has a 123 ignition system so I’m baffled. I’m trying to get her home and start che…