Was this will drawn up by a solicitor ? .Solicitors have to be ready to make a formal statement setting out the circumstances of the will being made.
Showing the deceased did not fully understand the provisions of the will is a lot easier than showing he was under such duress that he had lost his free will altogether or was completely out of sound mind.
In one case the deceased suddenly, near death, changed his will to give every bequest, being his own house and two others he owned in his home village, to his housekeeper, using his old will as a template and substituting the name of his housekeeper for that of his much loved niece.The solicitor had left, 'I leave the residue of my estate to [my niece]' copied unaltered into the new one..Residue' unusually ,was cash on deposit and quoted shares,more value than the named part of the estate The housekeeper didn't know of these.Patently the deceased didn't intend to exclude his niece altogether, as argued, and the new will made no sense since the houses cost money to maintain and he could have given the housekeeper more in cash instead,The housekeeper settled instantly out of court, accepting the terms of the old will.