The trust aims to support registered charities that are concerned with the preservation of wildlife and the environment.

The Trust has three funds:

• General Grants: supports smaller charities with general charitable activities across a range of issues as well as charities focusing on the conservation of wildlife and the environment.
• Martin Wills Wildlife Maintenance Trust grants: supports the conservation and maintenance – for the benefit of the public – of the natural environment and its indigenous woodland flora and fauna with particular reference to the conservation and maintenance of the character and amenity of rural areas.
• Large Grants: supports activities pertaining to environmental and wildlife issues only. (These grants are offered in fixed seven-year cycles, of which only two years are open to external applications.)

Grants can go towards revenue, capital or project expenditure.