hi Clare, he is 70. The estate is approx 350k with another 100k in savings etc. Yes, she will likely live there in future.
50. He wants her to inherit the other 50%.
He has no immediate family or close relatives. He is intending to leave another 50k to charity. This is on top of the amount already specified. My main concern is that he will be able to retain the right to live in his home as he has lived there all his life