My mother seems to think that if you dont make a will theres a good chance a chunk ends up going to the govt as inheritance tax etc.
Without wanting to sound rude, your mum is a bit confused the presence or lack of a will has got no bearing on inheritance tax. If you die without a will then your estate passes to your immediate family. If you have no family then it goes to the crown.
Inheritance tax is applied at 50% (IIRC) on anything above a certain figure - cant remember what the figure is but tis something like 250k or 350k
Regardless of that I want to make it explicit that my father gets nothing, and I need to say what should happen to any animals I may be keeping etc.
Just get a standard will form and leave it all to your mum tbh...