@Monday55 On this thread, as on others, people have asserted that merely being married makes assets and liabilities joint. That's not true.
Asset division on death is covered by the Will or intestacy rules. The latter is different depending on marital status, but a valid Will takes priority.
The OP can leave her assets, held in her sole name, any way she pleases on death, because they are hers, NOT joint. Her DH will only have rights to those assets in joint names, those she Wills to him, or those that he acquires under intestacy rules.
(That is why, if a house is owned in a particular way (I can never remember what it's called), the deceased can leave their share outright to a beneficiary and the beneficiary can, though the courts may put conditions on it, force the house to be sold to get their share, even if the spouse doesn't want that. But the mere fact that the house was a marital asset doesn't stop the deceased's share of it (if owned in this way) being left to someone other than the spouse.
Similarly, if the deceased owned shares, or had a bank account, in their sole name, they can leave those anywhere they pleased, regardless of the marital status.)
Marriage does NOT override the ownership of an asset if it is in a sole name, and the provisions of the Will, if one is made, or the laws of intestacy, will determine where that asset goes. If she is intestate, then those rules will apply.
So OP's inheritance, which she has said is in an account in her sole name, can be left as she pleases IF she makes a will, which she should ASAP.
In this case, however, the OP definitely needs legal advice from a good solicitor, to ensure that she can achieve what she wants to.