No problem, I'm sorry it lead to a bit of a dead end.
So I guess your aunt didn't marry Eric Bishop after all, or die in 1990?
You'll probably have to start searching through the rest of the Dulcie Carter's who married and died. She may have also moved to another country, so check the passenger lists.
* Correction a few minutes later- Dulcie died under her maiden name of Carter in 1990, sorry. This says she was born 12 April 1915