Hi All
Finally found the time to get our A3 1.2 TFSI into a local mechanic for the issue to be looked at., and told them about the problem.
So, the out come is this, no coolant leaks found.
They conducted a full coolant system pressure test, checked the expansion bottle for leaks, checked all the pipes and clamps, the water pump, and checked all the bolts as well.
No coolant leaks at all, the outcome was just general advice, check the levels weekly/monthly depending on the distance driven or will be driving.
So, if anyone suffers the same type of issue, and can find a problem please keep the forum updated, it will of great interest to me as well.
If I learn anything new, I will of course update as well.
Thank you all for help and advice.