You do not have to include funeral instructions in your Will.
Some find the whole process of making a Will a daunting enough process and to think about the funeral as well may be all a bit too much.
However, including funeral instructions in your Will can be of great assistance to those left behind who will have to organise things when you die.
The most obvious choice is whether you wish to be buried or cremated or to donate your body and / or organs.
You can specify where you wish to be buried or have your ashes buried or scattered, and of course, you can specify if a particular religious tradition is to be followed.