I really appreciate all your suggestions!!
Raging Bull: no i am not included in the will as my sibblings tricked both my parents into changing the will without their consent and forged mums signuture infact when I found out I called the solicitor and had a few words with him threatened to take him to the bar (law society) and no I cant afford to revoke the poa as last time it cost me thousands to battle it out with them in court as I had already revoked it the first time because they abandoned both of them and I ended up looking after them for three and half years.
Yan Bibiyan: As above and yes my dad can afford it as they sold his home and banked all his money in their own account but they wont give him a cent...just hitler cruel is the way to describe these people together with their husbands and not only that but the're rich financially, greed is a powerful force