My grandmother recently passed away leaving her house to my father and aunty in equal shares. My father is the executor. I have agreed to buy the place off my father and aunty. We have obtained a grant of probate and would like to now transfer the estate. As the executor, can my father transfer it directly to myself and avoid stamp duty or does it have to go to in my dads name (without SD) and then I buy it off him and pay stamp duty?