If you do not have a will, you die intestate and your estate will be distributed according to the laws of intestacy for England, Northern Ireland, Scotland and Wales. This may mean your assets may not be left to right people or in the proportions that you desire.
See: No Will Married, Children and No Will & Not Married
Same Rules if Your Will is or Becomes Invalid
Invalid wills also mean you die intestate, so the same intestacy rules apply and present problems for the estate in that executors cannot ‘prove’ the estate and so no grant of probate will be granted. You will need to complete additional forms with the Probate Registry to be accepted as an administrator of the estate. The Legal Services Consumer Panel estimates that one in five wills are invalid.
What Causes a Will to Fail and be Invalid?
You should always seek professional help when making a will or changing one to ensure that it does not fail.