Having travelled the world, I had long thought that the british plug design was one of the safest if not the safest design in the world.<p>There is no other plug that I'm aware of that locks the live and neutral the way the british plug does, and it requires some physical effort in order to hack it.<p>Having kids myself I can see the use of plug protection caps in other countries where the holes are completely exposed (I live in one such country) but to have a cap, that effectively renders the built-in protection useless has to be wrong. If anything it should enhance rather than override the mechanism, which could easily be achieved with good design.