Up to 40% of your estate may be stolen from your inheritors when you die. This can include any gifts you have made in the seven years prior to your death. The answer therefore is to make those gifts now because it ramps down, so the longer you live the less will be stolen. If you are still alive seven years after making the gift, the recipient keeps all of it.
Your house: Transfer title to your house to whomever you want to inherit. This of course means your inheritor now owns your house, so you'll need their co-operation if you subsequently want to move, but one assumes you're not going to leave your bequest to someone you don't trust so it shouldn't be an issue.
Your money: If you have a nest-egg set aside for your inheritors, i.e. money you're not planning to spend anyway, gift it to them now. Even if you don't want them to have control of it yet, you can still - as far as IHT is concerned - remove it from that threat by setting up a trust to be controlled by someone you know you can rely on to distribute it according to your wishes.
If, on the other hand, you decide to just give them the cash, advise them to work out the maximum amount of inheritance tax they could be liable for and squirrel it away where it can't be touched or maybe earn a little interest. If you're still alive seven years later they can do what they want with it.
Of course, if you approve of inheritance tax you can ignore all this inconvenience and instead just explain to your kids why you want to provide for the government rather than for your flesh & blood.