It is highly likely that your father is under some kind of undue influence although he may be very grateful to your brother and his wife (your father’s son and daughter-in-law) because they are looking after him.
I don’t like “they are sorting it out with the solicitor” because that’s certainly points to some kind of undue influence.
There is nothing to stop you having a conversation with your father.
The solicitor will not write to you about this and will not speak to you about it but you can write to the solicitor and advise him of this undue influence and asked for the letter to be kept on file. You can say that you understand the solicitor can’t discuss it but you need to advise the solicitor. The solicitor should therefore carry out his own enquiries.
Keep a copy of that letter and then, if your father eventually passes away, you can raise the issue of undue influence with regard to the transfer.
What you can also do is refer the matter to Social Services now as abuse of a vulnerable adult and you can tell the solicitor that you have done that. Be aware that it is probably not going to endear your brother and his wife to you and your father genuinely wants to do this, without any influence, it may not endear you to him either.
If you already have 15% in the property then regardless of what your father does you retain 15%
Thank you for letting me assist you with your legal question. I am glad that I was able to help.
I am not certain whether that answers the question for you or not, but I am happy to answer any specific points arising from this.
It will be my pleasure to help you again either further with this or any future questions you have