Update guys!
So finally worked the leak out after the dye showed no results. Leak on the heater core.
Planning on doing the evaporator core whilst I'm in there.
Bypassing it for now tomorrow until I can get all the parts together
I'm getting a very slight coolant smell when my heater is on. Not necessarily worried. But I my first thought was the heater matrix is on its way out. No coolant in the passenger footwear or anything and you can smell it in the engine bay.
I'm hearing the pipes in the engine bay may be leaking...