What the ?!£$" has an engineering degree got to do with it? I have a degree in electrical engineering too but there was no part of the course that had anything remotely to do with such mundane things as wiring accessories.
a "qualified electrician" is a totally different animal from an "electrical engineer" in the same way that a garage mechanic is different from a car's designer.
I think "plug top" is a description I would rarely use but I *might* use it to clarify something where the word plug would be ambiguous.