What kind of funeral?
You may want the tradition of a church funeral. The beauty and atmosphere of churches, the liturgy, the act of singing together, radiate a sense of ancient ceremony and ritual bringing comfort to many, and this may be enough.
But you can personalise the tradition by engaging the family and mourners during the ceremony, maybe by inviting them to light a tealight and place it on the coffin, weave a flower into a woven coffin or to leave their places and look at the pictures and messages written on a cardboard coffin. These small things are what make the service memorable and help people feel involved.
You may want a more simple low key ceremony at a crematorium. Or a service at a natural burial ground or another local venue in Heathfield or throughout East Sussex. This way you can have your service and celebrations at the same place.
Or maybe you would like just immediate family at the burial or cremation, or a direct cremation with no attendance, followed by a big celebration afterwards. Or you may want some space and wait a few weeks or months later for a memorial service. It is your choice.