Theloneranger

I currently live with my partner and we are privately renting. My father who is 62, disabled on PIP,care and mobility owns his house outright approximately £200,000 He would like to sell his house, gift the £200,000 to myself as this would be a partial deposit on a new bigger house, he will then move in with us so we can care for him and his maintenance. Myself and my partner would be obtaining a mortgage for the remaining amount. What inheritance tax implications would this incur now or in future and is this above board? Thanks