Yes, ashes of a much loved pet can be placed in your plot at the time of your own burial. Similarly, arrangements can be made for the ashes of a pet that survives its owner to be interred later, in the same plot or you can arrange an additional adjacent plot.
Do you have a code of practice?
THE ASSOCIATION OF NATURAL BURIAL GROUNDS This is to certify that Adam & Greenwood Funeral Home LLP, 19 Greens Farm Lane, Billericay, Essex CM11 2EZ