The certificate - well actually certificates, have arrived, but I've placed them in Covid -19 quarantine for a few days after having a brief look at the essential details.
I filled in one form but emailed them to ask if there was any chance of having both the literal (In Spanish - as described by MonicaL)and also the international version which is multilingual but has only the basic facts so Oldhippuone would have an English version. I knew it would take a couple of weeks, so after waiting patiently, I was pleasantly surprised to have about 3 copies of each after asking or 1. They have been so helpful at the registro civil office at Arona, they've really gone that extra mile.
However......as expected, there are sadly no details about Margaret's cause of death, but at least it confirms the time and date as being 5th January 2004. The cremation was to take place at the Tanatoria Servisa (does not state which one - there were 2 - one at Santa Cruz and the other at La Laguna. So now that we have a confirmed death date, I've contacted Servisa to see if they have any copies or details of the medical death certificate that was necessary to register Margaret's death and if they know whether her ashes were scattered at the crematorium (only just seeing your last post about possibly having brought them home). I'll see what they say (hopefully they'll get the email and respond) before I make further inquiries.
I'll look more closely at the other details on the certificates on Thursday, but I think it just gives the local legal directive followed and names of 2 people (not sure yet who they are though).
Oldhippyone I'm sending you a Personal message and I'll see if I can send the certificates to you via the rootschat personal message system in a few days once they're out of quarantine.