It's absolutely tragic.
I mean, it always is, for anyone to lose a child - but she had so many odds to overcome to have him and keep him, it's just heartbreaking.
I remember Alison as well - I can't remember if the show was Child of Our Times or whether she did another one just about her - but I remember being truly in awe of her skills with him as a baby.
So very bloody sad. RIP Parys - condolences to your mum, family and friends 