Yes, that's a point, and as the previous attempts on Simon's life and the intended attempt charges related to this lunch were dropped from this case, it could well be she could be retried for that, perhaps? Probably not...
I do find it fascinating that anyone could read the basic known facts, and the evidence so far, and believe this amazing series of coincidences occurred - that meant that although Erin read a post alerting and warning foragers about sightings of Death Cap mushrooms and went to that same area and returned and bought a dehydrator that same afternoon, and then when another post alerted about more DC in a different location, she went the next day to both locations where DC were sighted, and she accidentally foraged them!
Then she made, months later, a mushroom duxelle (muts have worn gloves!) for individual Beef Wellingtons and somehow absolutely none of the poisonous mushrooms went into her portion! Because if they had, she would have had at the very least, raised LFTs, and hers were normal.
And then, having accidentally used that dehydrator she bought on the day she accidentally foraged Death Caps, somehow no-one in the household ever did get poisoned before or after, as well as during the lunch. They are a lucky bunch.
And then, for reasons no-one can explain, she accidentally told the lunch party she had been diagnosed with ovarian cancer (of the elbow!), having used a major health update as the reason for extending a rare invitation to her house.
I am really looking forward to the toxicologist and mycologists the prosection will no doubt be calling to give evidence. Also, the digital forensics results.