suicidalgoldfish
An appeal re-makes the Decision that is being appealed so your age is not a factor and applies from the same date.
If you do not receive a PIP Daily Living award then you lose your entitlement to the SD Premium. Does your mother receive Pension Credit with the Severe Disability Element? If she does and you do not qualify for the Premium then she will also lose Element.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems