Thank you for your question
My name is ***** ***** I shall do my best to help you
There is no need for concern - this is about estate planning and being sensible.
Undue Influence implies that one person is using their influence to ensure their own advancement
I hope that this is of assistance - please ask if you need further details
There is no such requirement - your brother may have misunderstood the document
You are always free to write your own will - but in fairness solicitors make more money dealing with Home made Wills which have gone wrong than they do from ones the draft!