The water is not flowing through the rad or the matrix what else can it be, are they both blocked?
As I understand it the Matrix will get hot before the rad does anyway as the thermostat does not open until around 75-80 deg C allowing the water/engine to get up to temp quicker. Even with a failed thermostat the matrix would still get red hot, as this water flow bypasses the thermostat.
The fans were on constantly once the engine got upto temp approx 95 Deg C. this would also suggest that the water is just sitting in the engine and not circulating, the top hose was red hot and the bottom hose was cold, the heater is blowing warm at first then cold as you leave it on when it should be hot constantly as the water flows round it, there is no sign of a massive leak or loss of water (minor leak from the matrix), just the fact that the engine gets hot, the rad stays cold and the matrix has no hot flow through it.
Cheers Iain