As, I think, Greg said. The oil return hose was touching the exhaust manifold and had burnt through. This of course sprayed engine oil over the glowing hot manifold and caught fire. When it first ignited it looked bad and I thought it was only going to get worse, much worse ... and quickly unless the engine was turned off straight away. Obviously the longer the engine is running the more oil there is being sprayed onto the fire.
Luckily Dan was a lot more composed than I was and turned the engine off and put the fire out without any fuss.
In my defence though, I would have been a lot calmer if it was somebody else's twenty grand car.
Any road. Where was I? Oh yeah, the damage seems to be none.
Once the fire extinguisher powder was cleaned off and the oil residue cleaned off the manifold, wastegate etc I was surprised to see it was all fine, apart that damn hose of course.
I suppose most everything on that side of the engine is designed to be in a very hot environment and a few secs on fire doesn't do any harm. Amazing really.
I'm counting my lucky stars. Thank God it was raining this morning and I had to take it easy on my way there. If it hadn't been raining I would have blasted there in an effort not to be late. Then the fire would have happened on the road and the car would be a pile of ashes right now.