After a short search I found this link you may try: www.gov.bw/en/ministries--authorities/ministries/ministry-of-labour--home-affairs-mlha/tools--services/services--forms/death-registration/
Good luck
Hi Rob Traviss,
Hoping only to be helpful, here's an updated link to www.gov.bw's page "ministry of Labour & Home Affairs (MLHA)."