Alternative funerals range from secular (non-religious), to part spiritual, or spiritual but in an alternative way to the customs of organised faiths. They can also include Humanist funerals, which are devoid of any sort of spiritual association. With alternative funerals, you have a lot more choice over venue, location, and culture, and there is more room for creativity. They are usually led by a Celebrant who can accommodate the particular themes required, or a family member or close friend.
Green funerals (extreme) leaves no trace behind, and when considering this options, remember to consider the deep seated spiritual and psychological needs people have to memorialise a life somehow. These funerals reject cremation and flowers, and opt for burial in a site serving conservation which is not always visibly definable. The coffin is natural/sustainable or with an organic shroud. The grave may be hand-dug, and these funerals forbid demarcation and tending to a grave. They also discourage visits unless on foot.
Green funerals (non extreme) include a natural burial and are useful to plants. The body is buried at a depth where decomposition will be cold, slow and mostly anaerobic (absence of free oxygen). They don’t allow marking or delineation of plot. The position of the grave is legally recorded though. It’s the entire place that stands as a memorial to the dead.
DIY/Home Funerals are legal in the UK as long as they follow certain protocols. While you don’t need official permission to burry someone on your own land, it's advisable to notify DEFRA (https://www.gov.uk/government/organisations/department-for-environment-food-rural-affairs)to ensure the location is appropriate and seek their guidance on local laws and policies. For instance, the body must be located 100 metres away from any borehole, spring, or well, and 10 meters from a ditch, drain or watercourse. It is advised that the burial is marked on the property deeds, and the value of the property can go down as a result. Before you go ahead with this, you should check any covenants and bylaws preventing burial on the land in question and you should notify the local police and council. It's almost to understand that any future owners of the property may have the right to exhume the body if they wish. Loved ones of the deceased would also have to seek permission from any new owners to visit the site in the future.