How to set up a Will?

[king1]

I worked in law firms for most of my career, specialising in wills and estates.   I strongly advise against trying to prepare and  execute your will without professional input.   There are very very strict parameters to be observed, both in the wording and in the signing and witnessing of a will,  and if you make any mistakes it will at worst be invalid, or at best cost your heirs significant money to validate and administer

Is that the case even if the will is uncontested by siblings Olive?  

does the will need to be processed by a government department or some such that can lead to it being rejected as invalid?