I can understand your reluctance to initiate action to remove your father as executor, especially as he is deemed to have capacity, but equally to indulge him by taking no action could end up with a very difficult situation whereby he thinks he could buy another property and so on....
As things stand right now, you can do no right in his altered thinking, therefore taking action cannot make things any worse.
Equally, you could just take a watchful view for now, and hope that his more extreme ideas will pass, without you needing to challenge him.
Good luck!
Thank you Niciose. We are in such a state about what to do. We have appointment with our solicitor (we have been responding to his solicitor ourselves recently as £250 a letter is getting a tad expensive) who will advise our best option. We HAVE to do something, we cannot let this estrangement (albeit his choice) continue when he really needs to be with us that love him most. Ageuk have given us some excellent advice but of course, as he is very lucid, apart from paranoia and delusions (he says we phone him in early hours of the morning which is not true either) they and adult social services feel there is nothing they can do. This horrendous situation has taken over the whole families lives and all we can do is our best to get a happy ending to this as soon as possible. I'm sure the rigvastimine patches whilst alleviating a lot if the symptoms, actually make some worse.