Hi Ciderdrinker, thanks for your post.
I have now managed to locate the post 1880 burial register for Toller Fratrum & Wynford Eagle.
It is in the possession of the organisation that cares for the now closed St Basil's at Toller Fratrum.
I haven't seen the register but they did a look up for me & unfortunately Angelina was not recorded
as buried there. Since then I've checked on Dorset OPC & Ancestry every available parish within a 5 mile radius of Wynford Eagle & still not found her.
Current thought is that she was buried at Wynford Eagle but that the burial was not entered in the register of the two parishes, or less likely, that she was buried in a non conformist burial ground of which I haven't found any nearby.