Started taking the engine apart tonight, still can't find the piston. Obviously it's the third cylinder which went boom, but there is metal in all of them plus damaged valves in 3 and 4 (assuming cyl1 is drivers side)
It's blown a hole in the inner block/liner type thing and I've found some more fragments around the bay. It's also cut through some of the loom
Fourth cyl
Something missing?
Cyl one and four full of coolant, none in the correct places
Valve damage
Some more fragments