Freelander 1 v6 cooling issues

Hello all so here we go again. More problems. I recently had a water leak on the v6 freelander I was loosing coolant and the drivers side floor is soaking wet ( mine is a left hand drive version ) so sent it into the garage is was heading to Spain turned out it was water pump leaking so had that replaced the garage said the heater matrix was not leaking ? However after thee water pump was changed no coolant loss for a few days even after driving 1000 kilometres. It then started loosing coolant and carpet is still wet so it has to be heater matrix. I am returning to france this weekend so I have added some stop leak to get me home which has worked so far only thing I have noticed now is after a run my cooling fans are constantly running no overheating at turn the engine of and restart cooling fans stay off. Could this just be a coincidence that the temperature sensor has packed in ?. Thermostat is opening when stationary but not when driving is this normal. Worried as hell as I will replace all oil coolers and heater matrix when I get home parts have been ordered and will be there when I get home. Any advice urgently needed Nodge if you can help I’ll owe you one cheers all

Sounds like the heater matrix. A leaking water pump can't make the floor inside wet, but a leaking matrix will.

Could loop heater hoses together in the engine bay where they enter the bulkhead to get you home.
Wouldn't put stop leak in anything.
As you are not loosing coolant, could it be rainwater ingress??