I (as well as other members of the family) are pretty sure my Grandad has some form of dementia - he has memory problems, easily confused, delusional etc - and it is now at the point where he cannot leave the house alone and if he is left in the house for even a short time he usually has some sort of fall (although this doesn't happen if someone is home). He is very stubborn and doesn't like hospitals etc. He has a number of other illnesses and so visits the GP and nurses regularly but can come across as 'normal' when there. He refuses to accept that he has any problems.
We're not sure what to do to get him diagnosed and some help. He lives with my Granny who is not in the best of health herself and so cannot care for him, especially not if he gets worse. If a family member phones his GP and raises these concerns will they take notice even if the sufferer does not see any problems?