This case is not just between the young man and his grandmother.I'm not trying to say who's right or wrong in this case.... That's the job of the judge.
I just find it utter a disgrace for a young man to sue his own 87 yr old grandmother over a flat.
Once the case is settled, the guy can study in Australia .... and the old lady will sleep on the streets until she dies.
It could well be that the young man's mother (who divorced the old lady's son before he died) and the old lady's daughter also play a part in the proceedings.
The old lady would not be living on the streets, she has at least one other daughter based on newspaper reports.