Hi Den,
People who were under 65 when the PIP regulations came into effect will be 'invited' to claim PIP at some stage, even though you will be over 65 by then. Don't worry, you don't need to do anything yet. Claimants with indefinite awards will be contacted some time after Oct 2015 but we cannot say exactly when.
Nothing on this board constitutes legal advice - always consult a professional about specific problems