Leaving money to the Fungal Infection Trust in your will is a great way of ensuring that research and support for Fungal Diseases continues and hopefully leads to better treatment and outcomes for affected people.
People often use these donations in the UK to ensure that their estate (including property, savings, investments) falls below the limit for Inheritance Tax. The result is that the Fungal Infection Trust would receive a contribution rather than the Inland Revenue.
These arrangements are best made by a solicitor or attorney who specialise in this field. If you need to find a solicitor or attorney you can locate one here (UK only) or here (USA).
There are also several companies that will help you organise a legacy donation